Damage Specification Standards 2026

DSS-Ch
Chemical Attack/Etch/Reaction

Draft v1.0

DSS-Ch Page Overview

DSS-Ch identifies chemical attack, etching, staining, and reaction patterns on architectural glass. This page covers acid attack, alkaline cementitious attack, hard-water and mineral systems, solvent or cleaner burns, oxidizer/reducer discoloration, and sealer, repellent, or coating-interaction halos.

Use this page with GlassRenu VIS-A / VIS-DA, the applicable product specifications, and site safety protocols. DSS-Ch is intended to help distinguish true chemical alteration of the glass surface from removable films, mechanical scratches, coating anomalies, environmental residues, and unknown or mixed mechanisms before restoration work begins.

Table of Contents

Page Resources

Ch.01 Acid Attack

Ch.02 Alkaline Attack

Ch.03 Hard‑Water / Mineral System (three distinct)

Ch.04 Solvent/Chemical Burns

Ch.05 Oxidizers/Reducers

Ch.06 Sealers/Repellents/Coating Interactions

References & Citations

View DSS-Ch Reference Summary

The following references support the chemical attack, mineral, cleaner, and coating-interaction context used throughout DSS-Ch. Individual DSS entries include their own collapsed reference footers with the most relevant sources and internal cross-links.

Ch.01

Acid Attack

DSS-Ch.01.01

Acid-Etch Graffiti (HF / BOE)

DSS-Ch.01.01
Acid-Etch Graffiti (HF / BOE)
(Chemical — hydrofluoric/fluorosilicate attack; subsurface micro-texture “frost” with runs/lettering)

Classification & Scope (Normative)

Acid-etch graffiti is a chemically etched pattern (letters, tags, symbols, swirls) produced by hydrofluoric-bearing agents (e.g., HF gels, Buffered Oxide Etch/BOE). Reaction dissolves silica, leaving subsurface micro-texture (“frost”) and often drip legs or pooling halos. Classification is appearance-only per VIS (method-agnostic). Inspect after Non-Invasive Reveal under VIS lighting/geometry; record surface numbering and worked-surface status on Forms:

Safety note (informative): treat any fresh, wet, or unknown residue as hazardous; do not touch—document visually and defer cleaning to site protocols.

Typical Presentation (Informative)

  • Readable tag geometry (initials, loops, strokes) with soft-edged “frosted” fill; contrast increases on dark backdrops.
  • Drip legs descending from stroke ends; puddle/stop halos at start/finish points; occasional brush/dauber width consistency.
  • In raking light, etched areas exhibit non-directional, modeled micro-texture (whitish haze) rather than linear scratches.

Field Identification Cues (Normative)

  • Surface-catch class (MSRT)
  • Typically SC-2 (clear) within etched strokes; can read SC-1 at lighter attacks. Perform one light, non-marring pass; do not abrade. Use polymer stylus if a coating is suspected. MSRT supports classification only.
  • Visual signature
  • Continuous, filled strokes (not just line scratches), with soft boundaries and no chip-flank sparkle; drip legs and pooling halos common.
  • No discrete pits/nodules (separates from hot-particle pepper). No abrasive flank sparkle continuous over long run-length (separates from mechanical scoring).
  • Viewing / lighting
  • Evaluate clean & dry at 12 / 36 / 72 in using normal incidence and oblique sweep (~60°–120°) with raking light to resolve modeled micro-texture. Document distances/angles in-frame.
  • Location / access
  • Record pane ID and surface numbering (#1–#4; laminate-internal). If fixed parallax indicates a between-pane presentation, classify CAT-5 by location (out of in-place scope) and refer per protocol.
  • Mechanism cue (context)
  • Presence of acid applicators (daubers/etch-cream tubes), glove prints, or fresh chemical odor; proximity to public-facing elevations and transit nodes.

Severity & CAT Mapping (Normative)

  • Assign CAT by appearance + MSRT + morphology (three-part cueing). Depth bands are indicative; numeric measurement not required.
  • CAT-2 (Light): Thin, pale strokes with SC-1 to light SC-2; visible mainly under raking; minimal contrast at standard view. Indicative relief: ~10–40 µm.
  • CAT-3 (Moderate): Readable tag with SC-2 across strokes; modeled micro-texture clearly apparent at standard distance; drip legs/halos present. Indicative relief: ~40–120 µm.
  • CAT-4 (Severe): Dense, frosted fill or repeated over-etching with strong SC-2, high contrast at standard & wide-field views; occasional milkiness beyond stroke edges. Indicative relief: ~120–300 µm+.
  • CAT-5 (by location/condition): Between-pane/inaccessible by parallax, active cracks/pane instability, or confirmed functional-coating loss on the surface to be worked → CAT-5 (non-repairable/out of in-place scope).
  • CAT is appearance-based; acceptance is separate under VIS-A §6 at 12/36/72 in. Do not “probe” with MSRT.

Differentiation & Mis-ID Pitfalls (Informative)

  • vs. Mechanical scratch graffiti (M.01 / V.01.02): Mechanical tags show directional lineation with abrasive chip-flank sparkle along edges; acid-etch reads as filled, frosted strokes with modeled texture.
  • vs. Etch-cream (consumer) patterns (V.02.02): Creams can mimic HF but often yield more uniform matte with cleaner stencil edges; industrial HF/BOE shows runs/drips and variable intensity.
  • vs. Paint/marker coatings (V.03.01 / R.02.01): Coatings sit on the surface and remove at reveal; acid-etched areas remain with SC-class > 0.
  • vs. Alkaline cement/mortar etch (Ch.02.01/.02): Alkaline attacks appear as flow fields and sheeting patterns tied to runoff; HF tags show intentional stroke geometry and drip legs from application points.
  • vs. Coating anomalies (Co-family): Coating rub/patchiness yields sheen/color shifts but no etched relief; on a worked coated surface any anomaly is not permitted at acceptance (VIS §6.2.e).

Evidence Package (Documentation Requirements) (Normative)

  • Photo set (VIS): 12 / 36 / 72 in; normal + oblique; include raking macros that resolve modeled micro-texture within strokes, plus at least one context frame capturing full tag geometry and surroundings. Record distance/angle in-frame.
  • MSRT result: One light, non-marring pass on a representative stroke to record SC-class (SC-1/SC-2). Polymer stylus if coating is suspected.
  • Forms: Pane ID; product family & surface numbering; worked surface Y/N; functional coating present on worked surface? (Y/N/Unknown); reveal status; lighting/time; geometry checklist; photos attached.
  • Acceptance split: Post-restoration acceptance per VIS-A §6 at 12/36/72 in; classification ≠ acceptance. Coated-face appearance rules apply per VIS §6.2.e.

Reporting Language (Template)

  • Ch.01.01 Acid-Etch Graffiti (HF/BOE) — Etched tag strokes with [SC-1/SC-2] on surface #___, visible at [12/36/72 in] under VIS geometry after Non-Invasive Reveal. Morphology: frosted fill, modeled micro-texture, [drip legs/pool halos present/absent]; no chip-flank sparkle. Classification: CAT-[2/3/4] by relief/visibility; CAT-5 if between-pane, integrity cues, or coating-side loss on the surface to be worked. Forms + photo set completed; acceptance per VIS-A §6 (separate).
References & Related Links

Informative references and related internal links for context only. Product acceptance remains governed by the applicable project specifications, referenced product standards, and GlassRenu VIS/DSS procedures.

DSS-Ch.01.02

Muriatic / Brick-Wash Fallout (HCl)

DSS-Ch.01.02
Muriatic / Brick-Wash Fallout (HCl)
(Chemical — hydrochloric acid splash/mist/runoff; etched flow films and drip legs)

Classification & Scope (Normative)

Muriatic/brick-wash fallout is acid exposure from hydrochloric acid (HCl) solutions used for masonry cleaning or concrete etch. It typically presents as flow films, drip legs, and splash constellations that leave etched micro-texture and tone/shine shift on the exposed face. Classification is appearance-only per VIS (method-agnostic). Inspect after Non-Invasive Reveal under VIS lighting/geometry; record surface numbering and worked-surface status on Forms: Treat any fresh residue as hazardous; do not touch—document visually per site safety protocols.

Typical Presentation (Informative)

  • Vertical runs and drip legs beneath masonry interfaces, parapets, or slab edges; splash flecks near grade or scaffolding lines.
  • Soft-edged flow fields with higher contrast at run boundaries; in raking light, affected zones read as modeled micro-texture (non-directional).
  • May show streaked patterns from over-application, wind drift, or rinse shadowing; adjacent metals can show acid burn or discoloration.

Field Identification Cues (Normative)

  • Surface-catch class (MSRT)
  • SC-1 (slight) to SC-2 (clear) within etched run/film areas; SC-0 if only a residual cleaning film remains (reveal should remove film). Perform one light, non-marring pass; polymer stylus if a coating is suspected. MSRT supports classification only.
  • Visual signature
  • Flow-organized morphology: continuous bands/legs/sheets tied to gravity; no chip flanks or continuous abrasive tracks.
  • Boundary contrast strongest at flow edges, drip terminations, and pooling shelves; interiors read as low-contrast frost (modeled, not directional).
  • Viewing / lighting
  • Evaluate clean & dry at 12 / 36 / 72 in, using normal incidence and oblique sweep (~60°–120°) with raking light to reveal micro-texture and run edges. Document distances/angles in-frame.
  • Location / access
  • Record pane ID and surface numbering (#1–#4; laminate-internal). If fixed parallax indicates a between-pane presentation, classify CAT-5 by location (out of in-place scope) and refer.
  • Mechanism cue (context)
  • Recent/ongoing masonry acid cleaning, brick-wash rigs, acid spray/fog drift, or rinse-down above the lite; note windward/leeward orientation.

Severity & CAT Mapping (Normative)

  • Assign CAT by appearance + MSRT + morphology (three-part cueing). Depth ranges are indicative—measurement is not required.
  • CAT-1 (Benign / non-relief): Tone/shine shift only, SC-0 after reveal; visible primarily in raking at close/standard view; suggests residual film, not etch. Indicative relief: 0–10 µm.
  • CAT-2 (Light): Subtle etched flow film, SC-1, limited impact at standard view; edges soft. Indicative relief: 10–40 µm.
  • CAT-3 (Moderate): Clear detect (SC-2) across run/film; modeled micro-texture visible at standard distance with legible flow geometry. Indicative relief: 40–120 µm.
  • CAT-4 (Severe): Pronounced frost/matte along drip trains or pooling shelves; distinct at standard & wide-field; may exhibit localized whitening. Indicative relief: 120–300 µm+.
  • CAT-5 (by condition/location): Between-pane/inaccessible by parallax, integrity indicators (active cracks, pane movement), or confirmed functional-coating loss on the surface to be worked → CAT-5.
  • CAT is appearance-based; acceptance is separate under VIS-A at 12/36/72 in. Do not “probe” with MSRT.

Differentiation & Mis-ID Pitfalls (Informative)

  • vs. Acid-etch graffiti (Ch.01.01): Graffiti presents intentional stroke geometry with drip legs from stroke ends; brick-wash fallout shows gravity-organized sheets/runs without letterForms:
  • vs. Alkaline cement/mortar etch (Ch.02.01/.02): Alkaline attacks may leave grainy crusts or efflorescence residues and often produce chalky film; HCl fallout more often yields cleaner frost with sharper run edges after reveal.
  • vs. Mechanical scoring (M.01): Scoring shows continuous lineation with chip-flank sparkle; chemical runs are non-directional micro-texture within flow bands.
  • vs. Residue films (R-family): Paint/mud/detergent films remove at reveal and read SC-0; persistent SC-1/SC-2 indicates etch.
  • vs. Coating anomalies (Co-family): Coating rub/patchiness shows sheen/color shift but no etched relief; on a worked coated surface any anomaly is not permitted at acceptance (VIS §6.2.e).

Evidence Package(Documentation Requirements) (Normative)

  • Photo set (VIS): 12 / 36 / 72 in, normal + oblique; include raking macros resolving flow edges/drip legs and modeled micro-texture; add context frames showing masonry/cleaning source and runoff path. Record distance/angle in-frame.
  • MSRT result: One light, non-marring pass on a representative run/film; record SC-class (SC-1/SC-2 if etched; SC-0 if film only). Prefer polymer stylus if a coating is suspected.
  • Forms: Pane ID; product family & surface numbering; worked surface Y/N; functional coating present on worked surface? (Y/N/Unknown); reveal status; lighting/time; geometry checklist; photos attached.
  • Acceptance split: Post-restoration acceptance per VIS-A §6 at 12/36/72 in; classification ≠ acceptance. Coated-face appearance rules apply per VIS §6.2.e.

Reporting Language (Template)

  • Ch.01.02 Muriatic / Brick-Wash Fallout (HCl) — Flow-organized etched film with [SC-1/SC-2] on surface #___, visible at [12/36/72 in] under VIS geometry after Non-Invasive Reveal. Morphology: runs/drip legs/pooling edges with modeled micro-texture; no chip-flank sparkle or linear scoring. Classification: CAT-[2/3/4] by relief/visibility; CAT-5 if between-pane, integrity cues, or coating-side loss on the surface to be worked. Forms + photo set completed; acceptance per VIS-A §6 (separate).
References & Related Links

Informative references and related internal links for context only. Product acceptance remains governed by the applicable project specifications, referenced product standards, and GlassRenu VIS/DSS procedures.

DSS-Ch.01.03

Organic-Acid Residues (avian/biogenic high acidity)

DSS-Ch.01.03
Organic-Acid Residues (avian/biogenic high acidity)
(Chemical — localized biogenic acid attack; subsurface micro-texture “frost” with runs/pools)

Classification & Scope (Normative)

Organic-acid residues (e.g., avian droppings, certain plant/biogenic exudates) can produce localized chemical attack on glass, especially under heat + dwell (sun-exposed façades). Resulting appearance ranges from tone/shine shift to subsurface micro-texture (“frost”) with run/pool edges. Classification is appearance-only per VIS (method-agnostic). Inspect after Non-Invasive Reveal under VIS lighting/geometry; record surface numbering and worked-surface status on Forms: Treat fresh residues as biohazard; document visually per site safety protocols.

Typical Presentation (Informative)

  • Irregular patches/ovals with feathered margins, sometimes a central thicker pool and thin run-legs below.
  • After reveal, a soft haze remains within the former residue footprint; in raking light, affected zones read as modeled micro-texture (non-directional).
  • Strongest on sun-heated lites where acid dwell is prolonged; may align with ledge/perch lines or mullion drip paths.

Field Identification Cues (Normative)

  • Surface-catch class (MSRT)
  • SC-0 if only a faint optical/cleaning shadow remains (no relief).
  • SC-1 (slight) to SC-2 (clear) within etched footprints after reveal when micro-texture developed.
  • Perform one light, non-marring pass; polymer stylus if a coating is suspected. Do not abrade. MSRT supports classification only.
  • Visual signature
  • Footprint-bounded patch with soft, organic geometry (no letterforms); may show runs/tear-drop legs from gravity.
  • No chip-flank sparkle or linear continuity typical of mechanical scoring; no discrete pits/nodules typical of hot-particle peppering.
  • Viewing / lighting
  • Evaluate clean & dry at 12 / 36 / 72 in, using normal incidence and oblique sweep (~60°–120°) with raking light to reveal micro-texture and footprint boundaries. Record distances/angles in-frame.
  • Location / access
  • Record pane ID and surface numbering (#1–#4; laminate-internal). If fixed parallax indicates a between-pane presentation, classify CAT-5 by location and refer.
  • Mechanism cue (context)
  • Nearby perches/ledges/signage; nesting sites; overhead tree canopies; sun-exposed orientations increasing temperature/dwell.

Severity & CAT Mapping (Normative)

  • Assign CAT by appearance + MSRT + morphology (three-part cueing). Depth/relief ranges are indicative—field measurement not required.
  • CAT-1 (Benign / non-relief): Sheen/tone shift only, SC-0 after reveal; visible mainly in raking at close/standard view. Indicative relief: 0–10 µm (optical).
  • CAT-2 (Light): Subtle etched footprint, SC-1; limited impact at standard view; footprint edges soft. Indicative relief: 10–40 µm.
  • CAT-3 (Moderate): Clear detect (SC-2) with modeled micro-texture legible at standard distance; defined pool/run edges. Indicative relief: 40–120 µm.
  • CAT-4 (Severe): Pronounced frosted patch over a larger footprint or repeated incidents; distinct at standard & wide-field views. Indicative relief: 120–300 µm+.
  • CAT-5 (by condition/location): Between-pane/inaccessible by parallax, integrity indicators (active cracks, pane movement), or confirmed functional-coating loss on the surface to be worked → CAT-5 (out of in-place scope).
  • CAT is appearance-based; acceptance is separate under VIS-A at 12/36/72 in. Do not “probe” with MSRT.

Differentiation & Mis-ID Pitfalls (Informative)

  • vs. Muriatic/brick-wash fallout (Ch.01.02): HCl shows gravity-organized sheets/drip trains from construction context; biogenic footprints are localized organic patches with softer edges and perch context.
  • vs. Acid-etch graffiti (Ch.01.01): Graffiti presents intentional stroke geometry/drip legs; organic residues lack letterforms and show pool-centered footprints.
  • vs. Alkaline cement/mortar etch (Ch.02.01/.02): Alkaline attacks can leave chalky crust/efflorescence and grainy texture; organic acid footprints present smooth modeled micro-texture without alkaline crust.
  • vs. Residue films (R-family): Detergent/soot films remove at reveal and read SC-0; persisting SC-1/SC-2 indicates etch.
  • vs. Coating anomalies (Co-family): Coating rub/patchiness has sheen/color shift but lacks etch relief; on a worked coated surface, any anomaly is not permitted at acceptance (VIS §6.2.e).

Evidence Package(Documentation Requirements) (Normative)

  • Photo set (VIS): 12 / 36 / 72 in, normal + oblique; include raking macros resolving footprint interior + edge; add context frames (perch/ledge/tree canopies). Record distance/angle in-frame.
  • MSRT result: One light, non-marring pass on a representative area; record SC class (SC-0/1/2). Prefer polymer stylus if a coating is suspected.
  • Forms: Pane ID; product family & surface numbering; worked surface Y/N; functional coating present on worked surface? (Y/N/Unknown); reveal status; lighting/time; geometry checklist; photos attached.
  • Acceptance split: Post-restoration acceptance per VIS-A §6 at 12/36/72 in; classification ≠ acceptance. Coated-face appearance rules apply per VIS §6.2.e.

Reporting Language (Template)

  • Ch.01.03 Organic-Acid Residues (avian/biogenic) — Footprint-bounded patch with [SC-0/SC-1/SC-2] on surface #___, visible at [12/36/72 in] under VIS geometry after Non-Invasive Reveal. Morphology: modeled micro-texture within pool/run-edge; no chip-flank sparkle or linear scoring. Classification: CAT-[1/2/3/4] by relief/visibility; CAT-5 if between-pane, integrity cues, or coating-side loss on the surface to be worked. Forms + photo set completed; acceptance per VIS-A §6 (separate).
References & Related Links

Informative references and related internal links for context only. Product acceptance remains governed by the applicable project specifications, referenced product standards, and GlassRenu VIS/DSS procedures.

Ch.02

Alkaline Attack

DSS-Ch.02.01

Cement / Mortar Slurry Etch (high pH)

DSS-Ch.02.01
Cement / Mortar Slurry Etch (high pH)
(Chemical — alkaline attack; flow sheets, splash constellations, chalky crusts)

Classification & Scope (Normative)

Cement/mortar slurry etch is alkaline (high-pH) attack on the exposed glass surface from wet cement, mortar, grout, or concrete slurry. It presents as flow-organized films, splash/fleck constellations, and, after drying, may leave alkali/silicate reaction haze or chalky crusts; prolonged dwell can produce subsurface micro-texture (etch). Classification is appearance-only per VIS (method-agnostic). Inspect after Non-Invasive Reveal under VIS lighting/geometry; record surface numbering and worked-surface status on Forms: Handle fresh residues per site safety.

Typical Presentation (Informative)

  • Vertical sheets/runs beneath concrete or masonry work; edge pooling at gaskets/sills; speckled splash near mixing/cleanup zones.
  • After reveal: opaque or opalescent haze, sometimes with powdery/chalky residue at run edges; grainy micro-texture in raking light where etch formed.
  • May coexist with efflorescence on adjacent masonry or with sand fines embedded at the surface.

Field Identification Cues (Normative)

  • Surface-catch class (MSRT)
  • SC-0 when a residual film only remains (no relief) and clears with reveal.
  • SC-1 (slight) to SC-2 (clear) where alkaline etch produced micro-texture; single light, non-marring pass only; polymer stylus if a coating is suspected. MSRT supports classification only.
  • Visual signature
  • Flow-organized geometry (sheets/legs/pools) with soft to granular boundaries; interiors can show milky haze.
  • Under raking: grainy, modeled micro-texture (not linear scoring); no discrete fused nodules (separates from hot-particle damage).
  • Viewing / lighting
  • Evaluate clean & dry at 12 / 36 / 72 in, normal incidence and oblique sweep (~60°–120°) with raking light to resolve grain and edge buildup; document distances/angles in-frame.
  • Location / access
  • Record pane ID and surface numbering (#1–#4; laminate-internal). If fixed parallax shows a between-pane condition, classify CAT-5 by location and refer.
  • Mechanism cue (context)
  • Nearby concrete pours, masonry pointing/grouting, cutting or slurry cleanup, or rain-driven runoff from fresh cementitious work.

Severity & CAT Mapping (Normative)

  • Assign CAT by appearance + MSRT + morphology (three-part cueing). Depth ranges are indicative—measurement not required.
  • CAT-1 (Benign / non-relief): Film only, clears at reveal; SC-0; visible mainly in raking at close/standard. Indicative relief: 0–10 µm.
  • CAT-2 (Light): Subtle etched field with SC-1; grainy micro-texture apparent in raking; limited impact at standard view. Indicative relief: 10–40 µm.
  • CAT-3 (Moderate): SC-2 across flow bands; grainy frost legible at standard distance; edge build-ups well defined. Indicative relief: 40–120 µm.
  • CAT-4 (Severe): Pronounced matte/frosted sheets/legs; possible crust islands or aggregate fines impressions; distinct at standard & wide-field. Indicative relief: 120–300 µm+.
  • CAT-5 (by condition/location): Between-pane/inaccessible by parallax, integrity indicators (active cracks, pane movement), or confirmed functional-coating loss on the surface to be worked → CAT-5 (out of in-place scope).
  • CAT is appearance-based; acceptance is separate under VIS-A at 12/36/72 in. Do not “probe” with MSRT.

Differentiation & Mis-ID Pitfalls (Informative)

  • vs. HCl brick-wash fallout (Ch.01.02): HCl runs show cleaner frost with sharper run edges and often rusted metals nearby; alkaline slurry leaves chalky/grainy residue and milky haze.
  • vs. Organic-acid footprints (Ch.01.03): Biogenic patches are localized, organic shapes with pool centers; slurry forms sheeting/splash patterns aligned with work zones.
  • vs. Mechanical scoring (M.01): Scoring is linear with chip-flank sparkle; alkaline etch shows non-directional grain with flow geometry.
  • vs. Residue films (R-family): Detergent/mud films remove at reveal and remain SC-0; etched areas persist with SC-class > 0.
  • vs. Coating anomalies (Co-family): Coating rub/patchiness gives sheen/color shift but no etched relief; on a worked coated surface, any anomaly is not permitted at acceptance (VIS §6.2.e).

Evidence Package(Documentation Requirements) (Normative)

  • Photo set (VIS): 12 / 36 / 72 in, normal + oblique; include raking macros resolving grain and run edges; add context frames showing cement/masonry source and runoff path. Record distance/angle in-frame.
  • MSRT result: One light, non-marring pass on a representative field/run edge; record SC class (SC-0/1/2). Prefer polymer stylus if a coating is suspected.
  • Forms: Pane ID; product family & surface numbering; worked surface Y/N; functional coating present on worked surface? (Y/N/Unknown); reveal status; lighting/time; geometry checklist; photos attached.
  • Acceptance split: Post-restoration acceptance per VIS-A §6 at 12/36/72 in; classification ≠ acceptance. Coated-face appearance rules apply per VIS §6.2.e.

Reporting Language (Template)

  • Ch.02.01 Cement/Mortar Slurry Etch (high pH) — Flow-organized etched field with [SC-1/SC-2] on surface #___, visible at [12/36/72 in] under VIS geometry after Non-Invasive Reveal. Morphology: sheets/runs/splash with grainy micro-texture; no chip-flank sparkle. Classification: CAT-[2/3/4] by relief/visibility; CAT-5 if between-pane, integrity cues, or coating-side loss on the surface to be worked. Forms + photo set completed; acceptance per VIS-A §6 (separate).
References & Related Links

Informative references and related internal links for context only. Product acceptance remains governed by the applicable project specifications, referenced product standards, and GlassRenu VIS/DSS procedures.

DSS-Ch.02.02

Concrete Splash / Run-Off Etch Pattern

DSS-Ch.02.02
Concrete Splash / Run-Off Etch Pattern
(Chemical — alkaline attack; splash constellations, curtain-run bands, pooling shelves)

Classification & Scope (Normative)

Concrete splash/run-off etch is alkaline (high-pH) attack on the exposed glass surface resulting from fresh concrete wash-out, saw-cut slurry, or rain-driven run-off carrying cement fines. It presents as splash constellations, vertical curtain-run bands, and pooling shelves that can leave grainy micro-texture (etch) after residues are removed. Classification is appearance-only per VIS (method-agnostic). Inspect after Non-Invasive Reveal under VIS lighting/geometry; record surface numbering and worked-surface status on Forms: Handle fresh residues per site safety.

Typical Presentation (Informative)

  • Speckled splash fields (near grade, slab edges, saw-cut lines, or mixing stations).
  • Vertical “curtain” bands below slab edges, parapets, or jambs, sometimes with edge ridging where flow slowed/pooled.
  • After reveal, interiors read as milky/grainy frost; run edges show higher contrast; pooling shelves at gaskets/sills may remain dull.

Field Identification Cues (Normative)

  • Surface-catch class (MSRT)
  • SC-0 when only residual film was present and clears at reveal.
  • SC-1 (slight) to SC-2 (clear) where alkaline etch produced micro-texture. Perform one light, non-marring pass; polymer stylus if a coating is suspected. MSRT supports classification only.
  • Visual signature
  • Gravity-organized geometry: splash → constellations; runoff → contiguous vertical bands; pooling → horizontal shelf with duller tone.
  • Under raking: non-directional, grainy micro-texture (no chip-flank sparkle; no discrete nodules/pits).
  • Viewing / lighting
  • Evaluate clean & dry at 12 / 36 / 72 in, normal incidence and oblique sweep (~60°–120°) with raking light to resolve grain and edge contrast. Record distances/angles in-frame.
  • Location / access
  • Record pane ID and surface numbering (#1–#4; laminate-internal). If fixed parallax indicates between-pane, classify CAT-5 by location (out of in-place scope) and refer.
  • Mechanism cue (context)
  • Evidence of saw-cutting, wet curing/hosing, pump splatter, wash-out areas, or rain-carried fines from new concrete work above/adjacent.

Severity & CAT Mapping (Normative)

  • Assign CAT by appearance + MSRT + morphology (three-part cueing). Depth ranges are indicative—measurement not required.
  • CAT-1 (Benign / non-relief): Cleaning film only, clears at reveal; SC-0; visible mainly in raking. Indicative relief: 0–10 µm.
  • CAT-2 (Light): Subtle etched splash/run bands, SC-1; limited impact at standard view. Indicative relief: 10–40 µm.
  • CAT-3 (Moderate): SC-2 over larger curtain-run fields; grainy frost legible at standard distance; edge ridging/pooling shelves apparent. Indicative relief: 40–120 µm.
  • CAT-4 (Severe): Pronounced matte/frosted swaths with broad coverage or repeated events; distinct at standard & wide-field; may show opaque ridges at run terminations. Indicative relief: 120–300 µm+.
  • CAT-5 (by condition/location): Between-pane/inaccessible by parallax, integrity indicators (active cracks, pane movement), or confirmed functional-coating loss on the surface to be worked → CAT-5.
  • CAT is appearance-based; acceptance is separate under VIS-A at 12/36/72 in. Do not “probe” with MSRT.

Differentiation & Mis-ID Pitfalls (Informative)

  • vs. HCl brick-wash fallout (Ch.01.02): HCl runs show cleaner frost with sharper run edges; alkaline concrete leaves grainy/milky interiors and can show powdery edge build-ups.
  • vs. Organic-acid footprints (Ch.01.03): Biogenic patches are localized organic ovals with pool centers; concrete shows splash constellations and continuous curtain bands tied to work zones.
  • vs. Mechanical scoring (M.01): Scoring is directional lineation with chip-flank sparkle; alkaline etch is non-directional grain arranged by flow.
  • vs. Hot-particle damage (Th.01.xx): Slag/sparks produce discrete fused nodules/pits with bright rims; concrete etch lacks discrete pepper.
  • vs. Coating anomalies (Co-family): Coating rub/patchiness gives sheen/color shift but no etched relief; on a worked coated surface, any anomaly is not permitted at acceptance (VIS §6.2.e).

Evidence Package(Documentation Requirements) (Normative)

  • Photo set (VIS): 12 / 36 / 72 in, normal + oblique; include raking macros resolving grain and edge build-ups; add context frames showing splash source/runoff path (saw-cut lines, wash-out, slab edge). Record distance/angle in-frame.
  • MSRT result: One light, non-marring pass on representative splash/band/pooling shelf; record SC-class (SC-0/1/2). Polymer stylus if a coating is suspected.
  • Forms: Pane ID; product family & surface numbering; worked surface Y/N; functional coating present on worked surface? (Y/N/Unknown); reveal status; lighting/time; geometry checklist; photos attached.
  • Acceptance split: Post-restoration acceptance per VIS-A §6 at 12/36/72 in; classification ≠ acceptance. Coated-face appearance rules apply per VIS §6.2.e.

Reporting Language (Template)

  • Ch.02.02 Concrete Splash / Run-Off Etch — Splash constellations / curtain-run bands / pooling shelves with [SC-1/SC-2] on surface #___, visible at [12/36/72 in] under VIS geometry after Non-Invasive Reveal. Morphology: grainy micro-texture with edge contrast; no chip-flank sparkle or discrete pepper. Classification: CAT-[2/3/4] by relief/visibility; CAT-5 if between-pane, integrity cues, or coating-side loss on the surface to be worked. Forms + photo set completed; acceptance per VIS-A §6 (separate).
References & Related Links

Informative references and related internal links for context only. Product acceptance remains governed by the applicable project specifications, referenced product standards, and GlassRenu VIS/DSS procedures.

DSS-Ch.02.03

Efflorescence-Associated Surface Attack

DSS-Ch.02.03
Efflorescence-Associated Surface Attack
(Chemical — alkaline salts/waterborne alkali; run-bloom halos, crust islands, grainy micro-texture)

Classification & Scope (Normative)

Efflorescence-associated surface attack is alkaline exposure of glass from waterborne salts and pore solutions migrating out of concrete/masonry. As moisture evaporates, alkali-rich films and salt blooms at the glass interface can etch the exposed face, leaving grainy micro-texture and run/pool halos after residues are removed. Classification is appearance-only per VIS (method-agnostic). Inspect after Non-Invasive Reveal under VIS lighting/geometry; record surface numbering and worked-surface status on Forms: Handle active efflorescence per site safety.

Typical Presentation (Informative)

  • Run-bloom halos beneath masonry/copings/headers where moisture exits; feathered white bloom contiguous with vertical run legs.
  • Crust islands (thin, friable salt plates) at sill/gasket lines; after reveal, duller “shadow” remains with grainy micro-texture in raking light.
  • Seasonality common (wet, cooling periods); may repeat at the same geometry after rain/dry cycles.

Field Identification Cues (Normative)

  • Surface-catch class (MSRT)
  • SC-0 where salt residue only remains prior to reveal.
  • SC-1 (slight) to SC-2 (clear) if etch formed beneath/within the bloom footprint. Perform one light, non-marring pass; polymer stylus if a coating is suspected. MSRT supports classification only.
  • Visual signature
  • Feathered bloom edges and run halos; interiors read as milky/grainy frost after reveal.
  • No chip-flank sparkle (not mechanical); no discrete fused nodules/pits (not hot-particle).
  • Viewing / lighting
  • Evaluate clean & dry at 12 / 36 / 72 in, normal incidence and oblique sweep (~60°–120°) with raking light to resolve grain and bloom edges. Document distances/angles in-frame.
  • Location / access
  • Record pane ID and surface numbering (#1–#4; laminate-internal). If fixed parallax indicates between-pane, classify CAT-5 by location (out of in-place scope) and refer.
  • Mechanism cue (context)
  • Masonry/concrete interfaces above the lite; weep paths; sealant discontinuities; recurrent moisture events; visible white salt bloom on adjacent porous materials.

Severity & CAT Mapping (Normative)

  • Assign CAT by appearance + MSRT + morphology (three-part cueing). Depth ranges are indicative—measurement not required.
  • CAT-1 (Benign / non-relief): Bloom/film only, clears at reveal; SC-0; visible mainly in raking. Indicative relief: 0–10 μm.
  • CAT-2 (Light): Subtle etched halos/fields with SC-1; grain evident in raking; limited impact at standard view. Indicative relief: 10–40 μm.
  • CAT-3 (Moderate): SC-2 across broader run-bloom regions; grainy frost legible at standard distance; persistent halo geometry. Indicative relief: 40–120 μm.
  • CAT-4 (Severe): Pronounced matte/frosted swaths with repeated cycles; distinct at standard & wide-field; may show opaque edge crust shadows. Indicative relief: 120–300 μm+.
  • CAT-5 (by condition/location): Between-pane/inaccessible by parallax, integrity indicators (active cracks, pane movement), or confirmed functional-coating loss on the surface to be worked → CAT-5.
  • CAT is appearance-based; acceptance is separate under VIS-A at 12/36/72 in. Do not “probe” with MSRT.

Differentiation & Mis-ID Pitfalls (Informative)

  • vs. Concrete splash/run-off (Ch.02.02): Concrete splash yields speckled constellations/curtain bands tied to one-time events; efflorescence attack shows recurrent bloom halos following moisture/weep paths.
  • vs. HCl brick-wash fallout (Ch.01.02): HCl runs have cleaner frost with sharper borders; efflorescence often leaves feathered white bloom and granular ghosting after reveal.
  • vs. Organic-acid footprints (Ch.01.03): Biogenic patches are localized ovals with pool centers; efflorescence tracks porous-substrate moisture patterns (joints/headers/weep).
  • vs. Residue films (R-family): Detergent/soot films remove at reveal and remain SC-0; etched bloom persists with SC-class > 0.
  • vs. Coating anomalies (Co-family): Coating rub/patchiness shows sheen/color change but no etched relief; on a worked coated surface any anomaly is not permitted at acceptance (VIS §6.2.e).

Evidence Package(Documentation Requirements) (Normative)

  • Photo set (VIS): 12 / 36 / 72 in, normal + oblique; include raking macros resolving bloom edges/grain; add context frames showing weep paths, joints, porous substrates. Record distance/angle in-frame.
  • MSRT result: One light, non-marring pass on representative halo/interior; record SC-class (SC-0/1/2). Prefer polymer stylus if a coating is suspected.
  • Forms: Pane ID; product family & surface numbering; worked surface Y/N; functional coating present on worked surface? (Y/N/Unknown); reveal status; lighting/time; geometry checklist; photos attached.
  • Acceptance split: Post-restoration acceptance per VIS-A §6; classification ≠ acceptance. Coated-face appearance rules apply per VIS §6.2.e.

Reporting Language (Template)

  • Ch.02.03 Efflorescence-Associated Surface Attack — Run-bloom halos / crust islands with [SC-1/SC-2] on surface #___, visible at [12/36/72 in] under VIS geometry after Non-Invasive Reveal. Morphology: feathered bloom edges with grainy micro-texture; no chip-flank sparkle or discrete pepper. Classification: CAT-[2/3/4] by relief/visibility; CAT-5 if between-pane, integrity cues, or coating-side loss on the surface to be worked. Forms + photo set completed; acceptance per VIS-A §6 (separate).
References & Related Links

Informative references and related internal links for context only. Product acceptance remains governed by the applicable project specifications, referenced product standards, and GlassRenu VIS/DSS procedures.

Ch.03

Hard‑Water / Mineral System (three distinct)

DSS-Ch.03.01

Mineral Deposits (removable)

DSS-Ch.03.01
Mineral Deposits (removable)
(Chemical/mineral — bonded surface deposits; no subsurface attack when fully removed)

Classification & Scope (Normative)

Mineral deposits (removable) are bonded surface residues from hard water, irrigation overspray, construction rinse, or marine aerosol that sit on the glass and do not produce subsurface attack when promptly addressed. After a proper Non-Invasive Reveal (neutral pH/distilled water + lint-free microfiber) deposits may partially or fully clear; stubborn bonded residue may remain but, when fully removed without altering glass, no etched micro-texture is present. Classification here is appearance-only (method-agnostic). Inspect under VIS lighting/geometry and record surface numbering and worked-surface status on Forms:

Typical Presentation (Informative)

  • Spot constellations, rings/halos, or sheet-like films following spray/run patterns, sills, and mullions.
  • Whitish/opaque or crystalline look at the densest spots; no modeled micro-texture after complete removal.
  • Common at irrigation lines, spandrels below roof edges, kitchen/service elevations, and marine/coastal exposures.

Field Identification Cues (Normative)

  • Surface-catch class (MSRT)
  • Before removal, MSRT may feel gritty/proud residue (do not use MSRT across crystalline nodules).
  • After Non-Invasive Reveal and careful residue lift, a true deposit-only case will read SC-0 (no relief) on the glass substrate.
  • Use one light, non-marring pass only to confirm substrate relief status after residues are lifted at a small test area; polymer stylus if a coating is suspected. MSRT supports classification only.
  • Visual signature
  • Discrete spots with ring halos and run trains; may show crystalline sparkle at steep oblique before removal.
  • When fully removed, no residual modeled micro-texture/frost remains on glass.
  • Viewing / lighting
  • Evaluate clean & dry at 12 / 36 / 72 in, normal incidence and oblique sweep (~60°–120°) with raking light. Use raking after a controlled reveal test to confirm substrate is free of micro-texture.
  • Location / access
  • Record pane ID and surface numbering (#1–#4; laminate-internal). If fixed parallax indicates between-pane contamination (e.g., IGU deposit), classify CAT-5 by location (out of in-place scope).
  • Mechanism cue (context)
  • Irrigation overspray, leaky sills/weep paths, HVAC plume drift, kitchen/food-service aerosols, coastal salt (with inland dust) that dry to mineral films.

Severity & CAT Mapping (Normative)

  • Assign CAT by appearance under VIS geometry after reveal testing of a small, representative area. If, once residues are removed, the substrate reads SC-0, classify within CAT-1. If etch is present (SC-class > 0 with modeled micro-texture), use Ch.03.02 (staining, non-etch) or Ch.03.03 (etching) as appropriate.
  • CAT-1 (Benign / non-relief): Deposit only; after removal the substrate is SC-0 with no micro-texture; visibility at acceptance distances falls away when clean/dry. Indicative substrate relief: 0–10 μm (optical only).
  • Reclassify when:
  • Shadow persists after full removal but reads SC-0 → consider Ch.03.02 Mineral staining (non-etch).
  • Modeled micro-texture remains with SC-1/SC-2 → classify Ch.03.03 Mineral etching (CAT-2/3/4 by cues).
  • Between-pane → CAT-5 by location.
  • CAT is appearance-based; acceptance is separate under VIS-A at 12/36/72 in. Do not abrade to “force” removal during classification.

Differentiation & Mis-ID Pitfalls (Informative)

  • vs. Mineral staining (Ch.03.02): Staining leaves a cleaning-resistant tone shift but SC-0; deposits remove fully with no shadow.
  • vs. Mineral etching (Ch.03.03): Etch shows modeled micro-texture and SC-1/SC-2 after thorough removal.
  • vs. Alkaline/acid etch (Ch.01/.02): Chemical etch presents flow-organized films and SC-class > 0 on the substrate after residue removal.
  • vs. Hot-particle pepper (Th.01.xx): Pepper shows discrete fused nodules/pits and bright pit rims; deposits lack fused bodies.
  • vs. Coating anomalies (Co-family): Coating rub/patchiness persists as sheen/color shift while substrate may read SC-0; if on a worked coated face, such anomalies are not permitted at acceptance (VIS §6.2.e).

Evidence Package(Documentation Requirements) (Normative)

  • Photo set (VIS): 12 / 36 / 72 in, normal + oblique; capture pre-reveal overall and post-reveal test patch showing substrate condition; include raking macros verifying SC-0 after deposit removal. Record distance/angle in-frame.
  • MSRT result (substrate only): After lifting a small representative deposit without abrasion, record SC-class (expect SC-0 for deposit-only). Do not stylus across crystalline nodules.
  • Forms: Pane ID; product family & surface numbering; worked surface Y/N; functional coating present on worked surface? (Y/N/Unknown); reveal status; lighting/time; geometry checklist; photos attached.
  • Acceptance split: Post-restoration acceptance per VIS-A §6 at 12/36/72 in; classification ≠ acceptance. Coated-face rules apply per VIS §6.2.e.

Reporting Language (Template)

  • Ch.03.01 Mineral Deposits (removable) — Bonded surface deposits on surface #___; post-reveal test shows substrate SC-0 with no modeled micro-texture; visible at [12/36/72 in] pre-reveal only. Morphology: spot/ring/sheet film; no fused nodules or chip-flank sparkle. Classification: CAT-1 (deposit only). Reclassify to Ch.03.02 (staining) if tone shadow persists with SC-0, or Ch.03.03 (etch) if SC-class > 0 remains. CAT-5 if between-pane. Forms + photo set attached; acceptance per VIS-A §6.
References & Related Links

Informative references and related internal links for context only. Product acceptance remains governed by the applicable project specifications, referenced product standards, and GlassRenu VIS/DSS procedures.

DSS-Ch.03.02

Mineral Staining (persistent film/discoloration, non-etch)

DSS-Ch.03.02
Mineral Staining (persistent film/discoloration, non-etch)
(Chemical/mineral — tenacious surface film or color shift that persists after reveal; substrate remains SC-0)

Classification & Scope (Normative)

Mineral staining (non-etch) is a tenacious surface film or color shift caused by hard-water minerals/salts (often with organic/soiling binders) that persists after a proper Non-Invasive Reveal yet does not produce subsurface attack. Under magnification/raking, the glass substrate shows no modeled micro-texture when the stain is fully lifted—MSRT on clean substrate = SC-0. Classification here is appearance-only (method-agnostic). Inspect under VIS lighting/geometry and record surface numbering and worked-surface status on Forms:

Typical Presentation (Informative)

  • Residual tone/contrast shift (whitish, grey, brown, or iridescent cast) in the footprint of prior deposits/runs after normal cleaning.
  • Halos or bands at drip edges, sills, or mullions; sheet-like veil that softens reflections at certain angles.
  • Under raking: no granular/etched micro-texture on the substrate once an area is truly clean—appearance is optical film/contamination related.

Field Identification Cues (Normative)

  • Surface-catch class (MSRT)
  • On the clean glass substrate: SC-0 (no relief).
  • Across remaining film: avoid stylus use on contaminated patches; lift a small test spot (without abrasion) to expose substrate and confirm SC-0.
  • Polymer stylus if a coating is suspected. MSRT supports classification only.
  • Visual signature
  • Uniform or gently mottled veil; may track prior drip/run geometry, but edges are optically soft, not rimmed like etched boundaries.
  • No chip-flank sparkle (separates from mechanical scoring). No discrete pits/nodules (separates from hot-particle).
  • Viewing / lighting
  • Evaluate clean & dry at 12 / 36 / 72 in, normal incidence and oblique sweep (~60°–120°) with raking light on a revealed test patch to confirm absence of micro-texture. Document distances/angles in-frame.
  • Location / access
  • Record pane ID and surface numbering (#1–#4; laminate-internal). If fixed parallax indicates a between-pane condition (cavity film), classify CAT-5 by location (out of in-place scope).
  • Mechanism cue (context)
  • History of irrigation overspray, HVAC plume, coastal aerosol, or rinse sequences that left mineral/organic film; repeated wet/dry cycling without timely cleaning.

Severity & CAT Mapping (Normative)

  • Assign CAT by visibility impact under VIS geometry after a controlled reveal test confirms substrate SC-0. Because staining is non-etch, depth values are not applicable (substrate relief remains 0–10 μm optical only).
  • CAT-1 (Benign / non-relief): Faint veil/halo visible mainly in raking at close/standard; substrate SC-0 at the test patch.
  • CAT-2 (Light): Noticeable film at standard view under certain angles; still SC-0 on substrate where film is fully lifted; edges soft.
  • CAT-3 (Moderate): Persistent, broader veil/banding apparent at standard distance across larger area; SC-0 confirmed at localized lift.
  • Reclassify when: Any modeled micro-texture or SC-class > 0 persists on the substrate after true film removal → Ch.03.03 Mineral etching (CAT-2/3/4 by cues).
  • CAT-5 (by location/condition): Between-pane/inaccessible by parallax, integrity indicators, or confirmed functional-coating loss on the surface to be worked → CAT-5.
  • CAT is appearance-based; acceptance is separate under VIS-A at 12/36/72 in. Do not abrade to “force” removal during classification.

Differentiation & Mis-ID Pitfalls (Informative)

  • vs. Mineral deposits (Ch.03.01): Deposits fully remove with no residual tone shift; staining persists optically but remains SC-0 on substrate when truly clean.
  • vs. Mineral etching (Ch.03.03): Etch shows modeled micro-texture and SC-1/SC-2 after film removal; staining does not.
  • vs. Alkaline/acid etch (Ch.01/.02): Chemical etch exhibits run-organized micro-texture and SC-class > 0; staining is a film/optical condition.
  • vs. Coating anomalies (Co-family): Coating rub/patchiness may mimic a veil but will follow coating logic (on the worked coated surface any anomaly is not permitted at acceptance; VIS §6.2.e). Confirm coating presence.
  • vs. Soot/detergent films (R-family): Many remove at reveal; persistent non-etch staining may require specialized film lifting (outside classification scope).

Evidence Package(Documentation Requirements) (Normative)

  • Photo set (VIS): 12 / 36 / 72 in, normal + oblique; include pre-reveal overall, and a post-reveal test patch that demonstrates substrate SC-0 (raking macro). Record distance/angle in-frame.
  • MSRT result (substrate only): One light, non-marring pass on the clean test patch; record SC-0 if non-etch is confirmed.
  • Forms: Pane ID; product family & surface numbering; worked surface Y/N; functional coating present on worked surface? (Y/N/Unknown); reveal status; lighting/time; geometry checklist; photos attached.
  • Acceptance split: Post-restoration acceptance per VIS-A §6; classification ≠ acceptance. Coated-face rules apply per VIS §6.2.e.

Reporting Language (Template)

  • Ch.03.02 Mineral Staining (non-etch) — Persistent surface film/veil on surface #___; post-reveal test patch confirms substrate SC-0 and no modeled micro-texture. Visible at [12/36/72 in] under VIS geometry. Morphology: soft halos/bands/veil; no chip-flank sparkle; no discrete pepper. Classification: CAT-[1/2/3] by visibility impact (non-etch). Reclassify to Ch.03.03 if SC-class > 0 persists on substrate. CAT-5 if between-pane. Forms + photo set attached; acceptance per VIS-A §6.
References & Related Links

Informative references and related internal links for context only. Product acceptance remains governed by the applicable project specifications, referenced product standards, and GlassRenu VIS/DSS procedures.

DSS-Ch.03.03

Mineral Etching (subsurface micro-texture)

DSS-Ch.03.03
Mineral Etching (subsurface micro-texture)
(Chemical/mineral — dissolution of silica by mineral/alkaline films; modeled micro-texture “frost” within prior deposit/run footprints)

Classification & Scope (Normative)

Mineral etching is subsurface attack of the glass network produced by persistent mineral films (e.g., hard-water salts with alkaline bias) and wet/dry cycling that chemically dissolves silica at the surface. After a proper Non-Invasive Reveal, etched areas remain as modeled micro-texture (“frost”) that modifies tone/shine and specular clarity. Classification is appearance-only per VIS (method-agnostic). Inspect under VIS lighting/geometry; record surface numbering and worked-surface status on Forms:

Typical Presentation (Informative)

  • Footprints of former deposits/runs/edges that persist after reveal as soft-edged frosted fields; often mirrors drip trains, ring halos, pooling shelves, or sheeting paths.
  • In raking light the affected zone reads non-directional modeled micro-texture (not a line pattern); specular reflections appear dulled/milky.
  • May be patchy across exposure gradients (sprinkler throw arcs, sill zones, windward bands).

Field Identification Cues (Normative)

  • Surface-catch class (MSRT)
  • SC-1 (slight) to SC-2 (clear) on etched zones after reveal.
  • Perform one light, non-marring pass on a representative area; polymer stylus if a coating is suspected. MSRT supports classification only; do not abrade to “force” a response.
  • Visual signature
  • Modeled (non-directional) micro-texture confined to prior mineral footprints; no chip-flank sparkle (separates from mechanical scoring), no discrete fused nodules/pits (separates from hot-particle pepper).
  • Boundaries usually soft/feathered, occasionally ring-accented where drying fronts pinned.
  • Viewing / lighting
  • Evaluate clean & dry at 12 / 36 / 72 in, normal incidence and oblique sweep (~60°–120°); use raking light macros to resolve micro-texture. Record distances/angles in-frame.
  • Location / access
  • Record pane ID and surface numbering (#1–#4; laminate-internal). If fixed parallax indicates between-pane/cavity condition, classify CAT-5 by location (out of in-place scope) and refer.
  • Mechanism cue (context)
  • History of irrigation overspray, coastal aerosol + dust, HVAC plume drift, alkaline rinse/runoff, and poor maintenance enabling dwell/cycling.

Severity & CAT Mapping (Normative)

  • Assign CAT by appearance + MSRT + morphology (three-part cueing). Depth/relief values are indicative—field measurement not required.
  • CAT-2 (Light): Subtle modeled micro-texture, SC-1; visible primarily in raking at close/standard view; little impact at 36/72 in when clean/dry. Indicative relief: ~10–40 µm.
  • CAT-3 (Moderate): Clear detect (SC-2); frosted field legible at standard distance; footprint geometry evident (rings/runs/shelves). Indicative relief: ~40–120 µm.
  • CAT-4 (Severe): Pronounced matte/frosted regions obvious at standard & wide-field views; may appear whitened in strong raking. Indicative relief: ~120–300 µm+.
  • CAT-5 (by condition/location): Between-pane/inaccessible by parallax, integrity indicators (active cracks, pane movement), or confirmed functional-coating loss on the surface to be worked → CAT-5.
  • CAT is appearance-based; acceptance is separate under VIS-A at 12/36/72 in. Do not “probe” with MSRT.

Differentiation & Mis-ID Pitfalls (Informative)

  • vs. Mineral deposits (Ch.03.01): Deposits remove fully; etched substrate remains SC-1/SC-2 with modeled micro-texture after true removal.
  • vs. Mineral staining (Ch.03.02): Staining shows optical veil with substrate SC-0 once truly clean; etching shows substrate SC-class > 0.
  • vs. Alkaline slurry etch (Ch.02.01/.02): Slurry patterns are often sheeting/splash tied to concrete work; mineral etch commonly follows sprinkler arcs/ring halos with softer boundaries.
  • vs. Mechanical scoring (M.01): Scoring exhibits directional lineation and chip-flank sparkle; mineral etch is non-directional modeled.
  • vs. Coating anomalies (Co-family): Coating rub/patchiness can mimic sheen change but lacks substrate relief; on a worked coated surface, such anomalies are not permitted at acceptance (VIS §6.2.e). Confirm coated face.

Evidence Package(Documentation Requirements) (Normative)

  • Photo set (VIS): 12 / 36 / 72 in, normal + oblique; include raking macros resolving micro-texture and boundary; add context frames showing spray lines/sills/mullions or other exposure cues. Record distance/angle in-frame.
  • MSRT result: One light, non-marring pass on etched field; record SC-class (SC-1/SC-2). Polymer stylus if a coating is suspected.
  • Forms: Pane ID; product family & surface numbering; worked surface Y/N; functional coating present on worked surface? (Y/N/Unknown); reveal status; lighting/time; geometry checklist; photos attached.
  • Acceptance split: Post-restoration acceptance per VIS-A §6; classification ≠ acceptance. Coated-face rules apply per VIS §6.2.e.

Reporting Language (Template)

  • Ch.03.03 Mineral Etching — Modeled micro-texture within prior mineral footprint on surface #___ with [SC-1/SC-2]; visible at [12/36/72 in] under VIS geometry after Non-Invasive Reveal. Morphology: soft-edged frosted field (rings/runs/shelves), no chip-flank sparkle, no discrete pepper. Classification: CAT-[2/3/4] by relief/visibility; CAT-5 if between-pane, integrity cues, or coating-side loss on the surface to be worked. Forms + photo set attached; acceptance per VIS-A §6.
References & Related Links

Informative references and related internal links for context only. Product acceptance remains governed by the applicable project specifications, referenced product standards, and GlassRenu VIS/DSS procedures.

Ch.04

Solvent/Chemical Burns

DSS-Ch.04.01

Paint Remover / Solvent Bloom (matting / sheen loss)

DSS-Ch.04.01
Paint Remover / Solvent Bloom (matting / sheen loss)
(Chemical — solvent exposure; optical matting or non-directional micro-texture within spill/wipe footprints)

Classification & Scope (Normative)

Paint remover/solvent bloom is an appearance change caused by solvent-based strippers, thinners, or hot solvents contacting glass. Depending on chemistry, dwell, and heat, it presents as optical matting (sheen loss) and—in stronger cases—subtle non-directional micro-texture within a spill/wipe footprint. Classification is appearance-only per VIS (method-agnostic). Inspect after Non-Invasive Reveal under VIS lighting/geometry; record surface numbering and worked-surface status on Forms: Treat fresh/unknown liquids as hazardous; do not touch—document visually per site protocols.

Typical Presentation (Informative)

  • Irregular patches matching drip, wipe, or rag strokes adjacent to painted substrates; feathered perimeters or overlap lines from multi-pass wipes.
  • Sheen/contrast shift in specular view; at stronger events, soft “milkiness” (matting) within footprint.
  • May co-occur with softened paint films, adhesive ghosts, or streaks from re-dissolved binders.

Field Identification Cues (Normative)

  • Surface-catch class (MSRT)
  • SC-0 for optical-only matting (no relief).
  • SC-1 (slight) where very shallow modeled micro-texture formed after strong or hot-solvent exposure. SC-2 is uncommon.
  • Perform one light, non-marring pass; polymer stylus if a coating is suspected. MSRT supports classification only.
  • Visual signature
  • Footprint-bounded patch with soft edges or wipe overlaps; no chip-flank sparkle or linear abrasive tracks characteristic of mechanical scoring.
  • No discrete pits/nodules (separates from hot-particle peppering).
  • Viewing / lighting
  • Evaluate clean & dry at 12 / 36 / 72 in, normal incidence and oblique sweep (~60°–120°); use raking light to resolve matting or micro-texture; document distances/angles in-frame.
  • Location / access
  • Record pane ID and surface numbering (#1–#4; laminate-internal). If fixed parallax indicates between-pane residue or staining, classify CAT-5 by location (out of in-place scope) and refer.
  • Mechanism cue (context)
  • Nearby paint removal operations, open cans/bottles of solvent, rag piles, softened/“melted” paint edges, or fresh solvent odor. Look for wipe directionality in the footprint.

Severity & CAT Mapping (Normative)

  • Assign CAT by appearance + MSRT + morphology (three-part cueing). Depth/relief ranges are indicative—field measurement not required.
  • CAT-1 (Benign / non-relief): Sheen/tone shift only, SC-0; visible at certain angles, minimal impact at standard view. Indicative relief: 0–10 µm (optical).
  • CAT-2 (Light): Subtle modeled micro-texture, SC-1, confined to spill/wipe footprint; limited impact at standard view. Indicative relief: 10–40 µm.
  • CAT-3 (Moderate): SC-1 to SC-2 matting legible at standard distance across broader footprint or multiple overlapping wipes. Indicative relief: 40–120 µm.
  • CAT-4 (Severe): Pronounced matte field with obvious milky scatter at standard & wide-field views (rare for solvents alone; consider mixed chemistry). Indicative relief: 120–300 µm+.
  • CAT-5 (by condition/location): Between-pane/inaccessible by parallax, integrity indicators (active cracks/pane movement), or confirmed functional-coating loss on the surface to be worked → CAT-5 (non-repairable/out of in-place scope).
  • CAT is appearance-based; acceptance is separate under VIS-A at 12/36/72 in. Do not “probe” with MSRT.

Differentiation & Mis-ID Pitfalls (Informative)

  • vs. Adhesive remover staining (Ch.04.02): Adhesive removers often leave directional wipe veils that clear with correct film lifting; solvent bloom shows persistent sheen loss and may show SC-1 on the substrate.
  • vs. Degreaser/alkaline cleaner burn (Ch.04.03): Alkaline burns trend toward grainy micro-texture and can align with run sheets; solvent blooms are footprint/wipe bounded with softer interiors.
  • vs. Residue films (R-family): Paint or adhesive overspray/films remove at reveal and read SC-0 on substrate; bloom persists as optical matting ± SC-1.
  • vs. Mechanical abrasion (M.02.01 swirls): Abrasive swirls show directional arcs/tracks with edge sparkle and SC-1/SC-2 along paths; bloom lacks linear pathing and chip flanks.
  • vs. Coating anomalies (Co-family): Coating rub/patchiness presents sheen/color shift but is tied to coated faces; on a worked coated surface, any anomaly is not permitted at acceptance (VIS §6.2.e). Confirm coated face.

Evidence Package(Documentation Requirements) (Normative)

  • Photo set (VIS): 12 / 36 / 72 in, normal + oblique, with raking macros resolving matting boundaries/overlap lines; add context frames (tools, cans, work zone). Record distance/angle in-frame.
  • MSRT result: One light, non-marring pass on footprint interior; record SC-class (SC-0/1/2). Polymer stylus if coating is suspected.
  • Forms: Pane ID; product family & surface numbering; worked surface Y/N; functional coating present on worked surface? (Y/N/Unknown); reveal status; lighting/time; geometry checklist; photos attached.
  • Acceptance split: Post-restoration acceptance per VIS-A §6; classification ≠ acceptance. Coated-face appearance rules apply per VIS §6.2.e.

Reporting Language (Template)

  • Ch.04.01 Paint Remover / Solvent Bloom — Footprint-bounded matting on surface #___ with [SC-0/SC-1/SC-2], visible at [12/36/72 in] under VIS geometry after Non-Invasive Reveal. Morphology: sheen/contrast shift, soft edges/overlap lines; no chip-flank sparkle or discrete pepper. Classification: CAT-[1/2/3/4] by relief/visibility; CAT-5 if between-pane, integrity cues, or coating-side loss on the surface to be worked. Forms + photo set completed; acceptance per VIS-A §6 (separate).
References & Related Links

Informative references and related internal links for context only. Product acceptance remains governed by the applicable project specifications, referenced product standards, and GlassRenu VIS/DSS procedures.

DSS-Ch.04.02

Adhesive Remover Staining Pattern

DSS-Ch.04.02
Adhesive Remover Staining Pattern
(Chemical — solvent/citrus/amine blends lifting PSA binders; directional wipe veils, halos, overlap lines)

Classification & Scope (Normative)

Adhesive remover staining is an appearance change produced when label/film/PSA residue is treated with adhesive removers (e.g., citrus terpenes, glycol ethers, amines, mixed solvents). Incomplete lift and smear leave directional wipe veils, halos, and overlap lines; substrate may remain non-etched (often), but prolonged dwell/hot application can yield very shallow micro-texture. Classification is appearance-only per VIS (method-agnostic). Inspect after Non-Invasive Reveal under VIS lighting/geometry; record surface numbering and worked-surface status. Treat fresh/unknown liquids as hazardous; document visually per site safety.

Typical Presentation (Informative)

  • Directional wipe tracks radiating from a label/sticker site or protective-film edge, with lens-shaped halos and hard overlap boundaries where wipes ended.
  • Sheen/contrast shift in specular view; under raking, a thin veil remains in the wiped direction.
  • May include islands of tenacious PSA (tacky specks) along wipe trails; nearby you may find removed film backings or rag/pad lint.

Field Identification Cues (Normative)

  • Surface-catch class (MSRT)
  • SC-0 on the clean substrate once true residues are fully lifted (non-etch case).
  • SC-1 (slight) may be observed where hot/strong remover and pressure caused very shallow modeled texture; SC-2 is uncommon.
  • Perform one light, non-marring pass on a revealed test patch only (substrate), not across gummy islands. Use polymer stylus if a coating is suspected. MSRT supports classification only.
  • Visual signature
  • Wipe-direction veils with overlap lines and terminal “comma” ends; lens halos around former labels.
  • No chip-flank sparkle or continuous line scoring; no discrete fused nodules/pits (separates from hot-particle).
  • Viewing / lighting
  • Evaluate clean & dry at 12 / 36 / 72 in, with normal incidence and oblique sweep (~60°–120°); use raking light to reveal veiling and overlap boundaries. Record distances/angles in-frame.
  • Location / access
  • Record pane ID and surface numbering (#1–#4; laminate-internal). If fixed parallax indicates between-pane (e.g., cavity film from failed IGU laminate/labels), classify CAT-5 by location.
  • Mechanism cue (context)
  • Partially removed sticker/film, adhesive-remover bottles, rag/pad debris, or construction clean-off zones. Often present near shipping labels, temporal protection films, or security decals.

Severity & CAT Mapping (Normative)

  • Assign CAT by visibility impact and MSRT after a controlled reveal on a small patch to distinguish film vs. micro-texture. Depth values are indicative—field measurement not required.
  • CAT-1 (Benign / non-relief): Optical veiling only, SC-0 on clean substrate; visible primarily in raking at certain angles. Indicative relief: 0–10 µm (optical).
  • CAT-2 (Light): Subtle modeled micro-texture along wipe paths, SC-1; limited impact at standard view. Indicative relief: 10–40 µm.
  • CAT-3 (Moderate): SC-1 to SC-2 veiling/matting legible at standard distance across a broad wipe network with distinct overlap lines. Indicative relief: 40–120 µm.
  • CAT-4 (Severe): Rare for adhesive removers alone; consider mixed chemistry (alkaline/solvent stack) if pronounced matte fields appear across wide areas (then re-evaluate under Ch.04.03 or Ch.02 family). Indicative relief: 120–300 µm+.
  • CAT-5 (by condition/location): Between-pane/inaccessible by parallax, integrity indicators (cracking/pane movement), or confirmed functional-coating loss on the surface to be worked → CAT-5.
  • CAT is appearance-based; acceptance is separate under VIS-A §6 at 12/36/72 in. Do not abrade to “force” film removal during classification.

Differentiation & Mis-ID Pitfalls (Informative)

  • vs. Paint remover/solvent bloom (Ch.04.01): Solvent bloom footprints often have softer edges and global matting; adhesive-remover staining shows clear wipe directionality and overlap lines tied to label sites.
  • vs. Residual PSA film (R.01.05/R.01.06): Active PSA residue is tacky, lifts with appropriate film-lift methods, and once removed the substrate reads SC-0; staining persists optically if incomplete.
  • vs. Mechanical swirls (M.02.01): Abrasive swirls present arcs/tracks with edge sparkle and SC-1/SC-2 along lanes; adhesive veils are sheety with wipe vectors, not discrete abrasive tracks.
  • vs. Mineral staining/etch (Ch.03): Mineral conditions track spray/run geometry and may yield ring/arc halos; adhesive-remover staining centers on label/film locations with wipe vectors.
  • vs. Coating anomalies (Co-family): Coating rub/patchiness follows coating-face logic and lacks label-centric geometry; on a worked coated surface, any anomaly is not permitted at acceptance (VIS §6.2.e).

Evidence Package(Documentation Requirements) (Normative)

  • Photo set (VIS): 12 / 36 / 72 in, normal + oblique; include raking macros showing wipe vectors, overlap lines, and lens halos; add context frames (labels/film remnants, remover bottles/cloths). Record distance/angle in-frame.
  • MSRT result: One light, non-marring pass on a clean test patch; record SC-class (expect SC-0 for film-only; SC-1 if shallow micro-texture exists). Polymer stylus if coating is suspected.
  • Forms: Pane ID; product family & surface numbering; worked surface Y/N; functional coating present on worked surface? (Y/N/Unknown); reveal status; lighting/time; geometry checklist; photos attached.
  • Acceptance split: Post-restoration acceptance per VIS-A §6; classification ≠ acceptance. Coated-face appearance rules apply per VIS §6.2.e.

Reporting Language (Template)

  • Ch.04.02 Adhesive Remover Staining — Directional wipe veils/overlap lines centered on [label/film site] on surface #___; post-reveal test patch shows [SC-0/SC-1] on substrate; visible at [12/36/72 in] under VIS geometry. Morphology: lens halos, wipe vectors, soft matting; no chip-flank sparkle or discrete pepper. Classification: CAT-[1/2/3/4] by relief/visibility; CAT-5 if between-pane, integrity cues, or coating-side loss on the surface to be worked. Forms + photo set attached; acceptance per VIS-A §6.
References & Related Links

Informative references and related internal links for context only. Product acceptance remains governed by the applicable project specifications, referenced product standards, and GlassRenu VIS/DSS procedures.

DSS-Ch.04.03

Degreaser / Alkaline Cleaner “Burn”

DSS-Ch.04.03
Degreaser / Alkaline Cleaner “Burn”
(Chemical — high-pH cleaner exposure; grainy/milky micro-texture in wipe/run geometries)

Classification & Scope (Normative)

Degreaser/alkaline cleaner “burn” is an appearance change or etch caused by high-pH cleaners (e.g., strong degreasers, builders, ammonia/amine blends) contacting glass and dwell/drying on the surface. It presents as milky/grainy micro-texture in wipe vectors, sheeted runs, or pool halos. Classification is appearance-only per VIS (method-agnostic). Inspect after Non-Invasive Reveal under VIS lighting/geometry; record surface numbering and worked-surface status. Handle unknown liquids per site safety.

Typical Presentation (Informative)

  • Directional wipe lanes with terminal overlap lines; or broad sheeting fields with run legs/pooling shelves near sills and gaskets.
  • In specular view: sheen/contrast loss; in raking: non-directional grain within the wiped/run footprint (not linear scoring).
  • Often co-located with kitchen/service zones, construction cleanup areas, or where spray cleaners were applied and left to dry in sun.

Field Identification Cues (Normative)

  • Surface-catch class (MSRT)
  • SC-1 (slight) to SC-2 (clear) on etched lanes/fields after reveal.
  • Perform one light, non-marring pass on a representative interior area; polymer stylus if a coating is suspected. Do not “scrub-probe.” MSRT supports classification only.
  • Visual signature
  • Wipe/run-organized geometry with soft interiors and clear overlap/edge contrasts; interiors read as grainy micro-texture in raking.
  • No chip-flank sparkle (not mechanical scoring); no discrete fused nodules/pits (not hot-particle peppering).
  • Viewing / lighting
  • Evaluate clean & dry at 12 / 36 / 72 in, with normal incidence and oblique sweep (~60°–120°); include raking macros to resolve grain and edge transitions. Record distances/angles in-frame.
  • Location / access
  • Record pane ID and surface numbering (#1–#4; laminate-internal). If fixed parallax indicates a between-pane condition, classify CAT-5 by location and refer.
  • Mechanism cue (context)
  • Evidence of spray bottles, degreaser containers, janitorial carts, or kitchen exhaust plume residue; notes of application + sun/dwell sequences.

Severity & CAT Mapping (Normative)

  • Assign CAT by appearance + MSRT + morphology (three-part cueing). Depth ranges are indicative—field measurement not required.
  • CAT-2 (Light): Subtle grain in narrow wipe lanes; SC-1; limited impact at standard view. Indicative relief: ~10–40 µm.
  • CAT-3 (Moderate): Clear detect (SC-2) across broader wipe networks or sheeting fields; legible at standard distance; overlap lines distinct. Indicative relief: ~40–120 µm.
  • CAT-4 (Severe): Pronounced milky/grainy matte over large areas (e.g., entire panel wiped and dried in sun); obvious at standard & wide-field views. Indicative relief: ~120–300 µm+.
  • CAT-5 (by condition/location): Between-pane/inaccessible by parallax, integrity indicators (active cracks, pane movement), or confirmed functional-coating loss on the surface to be worked → CAT-5 (out of in-place scope).
  • CAT is appearance-based; acceptance is separate under VIS-A at 12/36/72 in. Do not “probe” with MSRT.

Differentiation & Mis-ID Pitfalls (Informative)

  • vs. Adhesive remover staining (Ch.04.02): Adhesive removers show wipe vectors but typically leave a thin optical veil (SC-0 on clean substrate) unless overheated; alkaline burn more often produces SC-1/SC-2 grain on the substrate.
  • vs. Solvent bloom (Ch.04.01): Solvent bloom tends toward soft matting with footprint-bounded shapes; alkaline burn often shows sheeting/run geometry with edge contrasts and more granular raking response.
  • vs. Mineral staining/etch (Ch.03): Mineral issues reflect spray arcs/rings/runoff; alkaline cleaner burn aligns with wipe vectors or broad sprayed sheets and building operations.
  • vs. Mechanical swirls (M.02.01): Abrasive swirls show arcs/tracks with edge sparkle; alkaline burn reads as non-directional grain without discrete pathing.
  • vs. Coating anomalies (Co-family): Coating rub/patchiness shows sheen/color shift but lacks substrate relief; on a worked coated surface any anomaly is not permitted at acceptance (VIS §6.2.e). Confirm coated face.

Evidence Package(Documentation Requirements) (Normative)

  • Photo set (VIS): 12 / 36 / 72 in, normal + oblique; include raking macros resolving grain and overlap/run edges; add context frames (cleaning supplies, janitorial/kitchen zones). Record distance/angle in-frame.
  • MSRT result: One light, non-marring pass on etched interior; record SC-class (SC-1/SC-2). Polymer stylus if coating is suspected.
  • Forms: Pane ID; product family & surface numbering; worked surface Y/N; functional coating present on worked surface? (Y/N/Unknown); reveal status; lighting/time; geometry checklist; photos attached.
  • Acceptance split: Post-restoration acceptance per VIS-A §6; classification ≠ acceptance. Coated-face appearance rules apply per VIS §6.2.e.

Reporting Language (Template)

  • Ch.04.03 Degreaser / Alkaline Cleaner “Burn” — Wipe/sheet-organized etched field with [SC-1/SC-2] on surface #___, visible at [12/36/72 in] under VIS geometry after Non-Invasive Reveal. Morphology: grainy micro-texture with overlap lines/run edges; no chip-flank sparkle or discrete pepper. Classification: CAT-[2/3/4] by relief/visibility; CAT-5 if between-pane, integrity cues, or coating-side loss on the surface to be worked. Forms + photo set completed; acceptance per VIS-A §6 (separate).
References & Related Links

Informative references and related internal links for context only. Product acceptance remains governed by the applicable project specifications, referenced product standards, and GlassRenu VIS/DSS procedures.

Ch.05

Oxidizers/Reducers

DSS-Ch.05.01

Bleach / Peroxide Shadowing

DSS-Ch.05.01
Bleach / Peroxide Shadowing
(Chemical — oxidizer exposure; optical tone shift ± very shallow micro-texture within spill/wipe footprints)

Classification & Scope (Normative)

Bleach/peroxide shadowing is an appearance change caused by oxidizing agents (e.g., sodium hypochlorite bleach, hydrogen peroxide cleaners) contacting glass and drying/dwelling on the surface, sometimes in sunlight/heat. It presents as optical tone/contrast shift and, in stronger cases, very shallow, non-directional micro-texture within a spill/wipe footprint. Classification is appearance-only per VIS (method-agnostic). Inspect after Non-Invasive Reveal under VIS lighting/geometry; record surface numbering and worked-surface status. Treat fresh/unknown liquids per site safety.

Typical Presentation (Informative)

  • Irregular patches matching spill, spray, or wipe vectors, often near janitorial zones or façade-cleaning operations.
  • Slight whitening or desaturation of reflections in specular view; under raking, interiors may read very fine modeled micro-texture (when concentrated or sun-baked).
  • Edges are usually soft/feathered; overlap lines appear where multiple wipes ended.

Field Identification Cues (Normative)

  • Surface-catch class (MSRT)
  • Commonly SC-0 (optical only).
  • SC-1 (slight) can occur after concentrated or heated oxidizer dwell; SC-2 is rare.
  • Perform one light, non-marring pass on a representative interior area; polymer stylus if a coating is suspected. MSRT supports classification only.
  • Visual signature
  • Footprint-bounded tone shift with soft edges; interiors appear non-directional (not lineation).
  • No chip-flank sparkle (not mechanical), no discrete fused nodules/pits (not hot-particle).
  • Viewing / lighting
  • Evaluate clean & dry at 12 / 36 / 72 in, with normal incidence and oblique sweep (~60°–120°); use raking light macros to confirm presence/absence of micro-texture. Record distances/angles in-frame.
  • Location / access
  • Record pane ID and surface numbering (#1–#4; laminate-internal). If fixed parallax indicates a between-pane condition, classify CAT-5 by location (out of in-place scope) and refer.
  • Mechanism cue (context)
  • Evidence of bleach/peroxide cleaners, sprayers, janitorial carts, or pressure-washing with oxidizing additives; note sun exposure/dwell time.

Severity & CAT Mapping (Normative)

  • Assign CAT by appearance + MSRT + morphology (three-part cueing). Depth/relief values are indicative—field measurement not required.
  • CAT-1 (Benign / non-relief): Optical tone/contrast shift only, SC-0; visible mainly at certain angles or in raking; minimal impact at standard view. Indicative relief: 0–10 μm (optical).
  • CAT-2 (Light): Very shallow modeled micro-texture, SC-1, confined to spill/wipe footprint; limited impact at standard view. Indicative relief: ~10–40 μm.
  • CAT-3 (Moderate): Broader matte/whitened footprint legible at standard distance; SC-1 to SC-2. Indicative relief: ~40–120 μm.
  • CAT-4 (Severe): Uncommon for oxidizers alone; if pronounced matte fields or wide-area whitening are present, consider mixed chemistry (alkaline/oxidizer stack) and re-evaluate under applicable DSS. Indicative relief: ~120–300 μm+.
  • CAT-5 (by condition/location): Between-pane/inaccessible by parallax, integrity indicators (active cracks/pane movement), or confirmed functional-coating loss on the surface to be worked → CAT-5.
  • CAT is appearance-based; acceptance is separate under VIS-A at 12/36/72 in. Do not “probe” with MSRT.

Differentiation & Mis-ID Pitfalls (Informative)

  • vs. Degreaser/alkaline burn (Ch.04.03): Alkaline burn shows grainier micro-texture with sheet/run geometries; oxidizer shadowing tends to be softer, optical with SC-0 to SC-1.
  • vs. Adhesive remover staining (Ch.04.02): Adhesive remover exhibits wipe directionality + overlap lines centered on label sites; oxidizer footprints may be broader sprays or mop wipes.
  • vs. Mineral staining/etch (Ch.03): Mineral conditions follow spray arcs/rings/runs and often yield ring halos; oxidizer shadowing lacks mineral ring morphology.
  • vs. Solvent bloom (Ch.04.01): Solvent bloom can present similar matting but is linked to paint removal context; cross-check site operations.
  • vs. Coating anomalies (Co-family): Coating rub/patchiness gives sheen/color shift but lacks chemical exposure context; on a worked coated surface any anomaly is not permitted at acceptance (VIS §6.2.e).

Evidence Package(Documentation Requirements) (Normative)

  • Photo set (VIS): 12 / 36 / 72 in, normal + oblique; include raking macros of footprint interior and edges; add context frames (cleaners, carts, work area). Record distance/angle in-frame.
  • MSRT result: One light, non-marring pass on footprint interior; record SC-class (SC-0/SC-1/SC-2). Polymer stylus if coating is suspected.
  • Forms: Pane ID; product family & surface numbering; worked surface Y/N; functional coating present on worked surface? (Y/N/Unknown); reveal status; lighting/time; geometry checklist; photos attached.
  • Acceptance split: Post-restoration acceptance per VIS-A §6; classification ≠ acceptance. Coated-face appearance rules apply per VIS §6.2.e.

Reporting Language (Template)

  • Ch.05.01 Bleach / Peroxide Shadowing — Footprint-bounded tone/whitening on surface #___ with [SC-0/SC-1/SC-2], visible at [12/36/72 in] under VIS geometry after Non-Invasive Reveal. Morphology: soft edges, non-directional interior, no chip-flank sparkle, no discrete pepper. Classification: CAT-[1/2/3/4] by relief/visibility; CAT-5 if between-pane, integrity cues, or coating-side loss on the surface to be worked. Forms + photo set completed; acceptance per VIS-A §6 (separate).
References & Related Links

Informative references and related internal links for context only. Product acceptance remains governed by the applicable project specifications, referenced product standards, and GlassRenu VIS/DSS procedures.

DSS-Ch.05.02

Reducing Agent Discoloration

DSS-Ch.05.02
Reducing Agent Discoloration
(Chemical — reducers/neutralizers; optical tone shift ± very shallow micro-texture within wipe/run footprints)

Classification & Scope (Normative)

Reducing agent discoloration is an appearance change caused by reducing chemicals (e.g., bisulfites/metabisulfites, thiols, ammonia-based reducers/neutralizers, specialty graffiti/bleach neutralizers) contacting glass and dwelling/drying on the surface. Outcomes range from optical tone/contrast shift to very shallow, non-directional micro-texture within wipe or run geometries. Classification is appearance-only per VIS (method-agnostic). Inspect after Non-Invasive Reveal under VIS lighting/geometry; record surface numbering and worked-surface status. Treat fresh/unknown liquids per site safety.

Typical Presentation (Informative)

  • Wipe-bounded patches with overlap lines or sheeted runs/legs below treatment areas (e.g., after neutralizing oxidizers or cleaning masonry/metal stains).
  • Specular: dull or slightly yellow/grey cast versus surrounding glass.
  • Raking: very fine modeled micro-texture may appear in stronger events; many remain optical only.

Field Identification Cues (Normative)

  • Surface-catch class (MSRT)
  • Often SC-0 (optical only).
  • SC-1 (slight) can occur where reducers dwelled in heat/sun or were used concentrated; SC-2 is rare.
  • Perform one light, non-marring pass on a representative interior area; polymer stylus if a coating is suspected. MSRT supports classification only.
  • Visual signature
  • Footprint-bounded veils with wipe directionality or run legs; interiors non-directional (not linear scoring).
  • No chip-flank sparkle (not mechanical); no discrete fused nodules/pits (not hot-particle).
  • Viewing / lighting
  • Evaluate clean & dry at 12 / 36 / 72 in, with normal incidence and oblique sweep (~60°–120°); use raking light macros to confirm presence/absence of micro-texture. Record distances/angles in-frame.
  • Location / access
  • Record pane ID and surface numbering (#1–#4; laminate-internal). If fixed parallax indicates between-pane condition, classify CAT-5 by location (out of in-place scope) and refer.
  • Mechanism cue (context)
  • Evidence of neutralization steps following oxidizer or acid clean-downs; sulfite/amine reducers, ammonia-bearing products, or specialty graffiti neutralizers; notes of sun/heat during dwell.

Severity & CAT Mapping (Normative)

  • Assign CAT by appearance + MSRT + morphology (three-part cueing). Depth/relief values are indicative—field measurement not required.
  • CAT-1 (Benign / non-relief): Optical tone/contrast shift only, SC-0; visible mainly at certain angles/raking; minimal at standard view. Indicative relief: 0–10 μm (optical).
  • CAT-2 (Light): Very shallow modeled micro-texture, SC-1, confined to wipe/run footprint; limited impact at standard view. Indicative relief: ~10–40 μm.
  • CAT-3 (Moderate): Broader matte/veil legible at standard distance, SC-1 to SC-2; repeat passes/overlaps evident. Indicative relief: ~40–120 μm.
  • CAT-4 (Severe): Uncommon for reducers alone; if pronounced matte fields occur, consider mixed chemistry (alkaline + reducer stack) and re-evaluate under applicable DSS. Indicative relief: ~120–300 μm+.
  • CAT-5 (by condition/location): Between-pane/inaccessible by parallax, integrity indicators (active cracks/pane movement), or confirmed functional-coating loss on the surface to be worked → CAT-5.
  • CAT is appearance-based; acceptance is separate under VIS-A at 12/36/72 in. Do not “probe” with MSRT.

Differentiation & Mis-ID Pitfalls (Informative)

  • vs. Bleach/peroxide shadowing (Ch.05.01): Oxidizer shadows are often whiter; reducer discoloration trends neutral/yellow-grey; both may be optical (SC-0) or SC-1 with dwell/heat.
  • vs. Degreaser/alkaline burn (Ch.04.03): Alkaline burn shows grainier micro-texture and sheet/run geometries; reducer discoloration frequently softer and less granular.
  • vs. Adhesive remover staining (Ch.04.02): Adhesive removers are tied to label/film sites with distinct overlap lines; reducer stains map to neutralization zones after chemical cleaning.
  • vs. Mineral staining/etch (Ch.03): Mineral issues reflect spray arcs/rings/runoff and may leave ring halos; reducer stains follow wipe sheets around treated substrates.
  • vs. Coating anomalies (Co-family): Coating rub/patchiness shows sheen/color shift without chemical context; on a worked coated surface, any anomaly is not permitted at acceptance (VIS §6.2.e). Confirm coated face.

Evidence Package(Documentation Requirements) (Normative)

  • Photo set (VIS): 12 / 36 / 72 in, normal + oblique; include raking macros of footprint interiors and overlap/run edges; add context frames (neutralizers/containers, work zone). Record distance/angle in-frame.
  • MSRT result: One light, non-marring pass on footprint interior; record SC-class (SC-0/SC-1/SC-2). Polymer stylus if coating is suspected.
  • Forms: Pane ID; product family & surface numbering; worked surface Y/N; functional coating present on worked surface? (Y/N/Unknown); reveal status; lighting/time; geometry checklist; photos attached.
  • Acceptance split: Post-restoration acceptance per VIS-A §6; classification ≠ acceptance. Coated-face appearance rules apply per VIS §6.2.e.

Reporting Language (Template)

  • Ch.05.02 Reducing Agent Discoloration — Footprint-bounded veil on surface #___ with [SC-0/SC-1/SC-2], visible at [12/36/72 in] under VIS geometry after Non-Invasive Reveal. Morphology: soft wipe/run interior, overlap lines; no chip-flank sparkle, no discrete pepper. Classification: CAT-[1/2/3/4] by relief/visibility; CAT-5 if between-pane, integrity cues, or coating-side loss on the surface to be worked. Forms + photo set completed; acceptance per VIS-A §6 (separate).
References & Related Links

Informative references and related internal links for context only. Product acceptance remains governed by the applicable project specifications, referenced product standards, and GlassRenu VIS/DSS procedures.

Ch.06

Sealers/Repellents/Coating Interactions

DSS-Ch.06.01

Silane / Siloxane Migration Halo

DSS-Ch.06.01
Silane / Siloxane Migration Halo
(Chemical/interaction — penetrating water-repellent from adjacent porous substrates; optical halos/veils, transfer films ± shallow micro-texture)

Classification & Scope (Normative)

Silane/siloxane migration halo is an appearance change on glass resulting from penetrating water-repellent treatments (silane/siloxane) applied to adjacent porous materials (masonry/concrete/stone). During application, overspray, vapor phase, or capillary contact/weep can deposit organosilicon films on the glass, producing optical halos/veils and, with UV/heat/soiling, tenacious films that may leave very shallow micro-texture after long dwell. Classification is appearance-only per VIS (method-agnostic). Inspect after Non-Invasive Reveal under VIS lighting/geometry; record surface numbering and worked-surface status. Handle active chemical work zones per site safety.

Typical Presentation (Informative)

  • Halo or band parallel to masonry joints, sills, copings, drip edges, or sealant interfaces; may trace weep paths or roller/spray edges.
  • Iridescent or greasy-sheen veil in specular view; soft edge on the glass side, sharper edge at the masonry boundary; may accumulate soiling preferentially over time (“dirty halo”).
  • After reveal, portion of the veil persists; in stronger/aged cases, very fine modeled micro-texture may be noted at raking.

Field Identification Cues (Normative)

  • Surface-catch class (MSRT)
  • Frequently SC-0 (optical film only) on freshly contaminated glass.
  • SC-1 (slight) may occur on aged/UV-baked halos where organosilicon residues cross-link with contaminants, leaving very shallow texture. SC-2 uncommon.
  • Perform one light, non-marring pass on a revealed test patch only; polymer stylus if a functional coating is suspected on the worked face. MSRT supports classification only.
  • Visual signature
  • Linear/curvilinear band coincident with treated substrate geometry (head/sill/jamb lines, parapets); soft interior, sometimes tide-line edge toward the glass field.
  • No chip-flank sparkle (not mechanical scoring); no discrete pits/nodules (not hot-particle peppering).
  • Viewing / lighting
  • Evaluate clean & dry at 12 / 36 / 72 in, using normal incidence and oblique sweep (~60°–120°); use raking light to resolve veil presence and any fine texture. Record distances/angles in-frame.
  • Location / access
  • Record pane ID and surface numbering (#1–#4; laminate-internal). If fixed parallax indicates between-pane film (IGU), classify CAT-5 by location (out of in-place scope) and refer.
  • Mechanism cue (context)
  • Recent or historic water-repellent treatment on adjacent masonry/stone, presence of sprayers/rollers, masking lines, or contractor notes; weather window during application (wind, sun).

Severity & CAT Mapping (Normative)

  • Assign CAT by visibility impact and MSRT after controlled reveal on a small representative area. Depth values are indicative—field measurement not required.
  • CAT-1 (Benign / non-relief): Optical halo/veil only, SC-0 on clean substrate; visible primarily at certain angles/raking; limited at standard view. Indicative relief: 0–10 μm (optical).
  • CAT-2 (Light): Persistent thin film with SC-1 at a revealed test patch (aged case); limited impact at standard view; edges track substrate geometry. Indicative relief: ~10–40 μm.
  • CAT-3 (Moderate): Broader banding/halo legible at standard distance with SC-1 to SC-2 in aged regions; often co-located with soil accumulation. Indicative relief: ~40–120 μm.
  • CAT-4 (Severe): Rare for silane/siloxane alone; if pronounced matte fields or widespread cross-linked texture occur, consider mixed chemistry (alkali + organosilicon + UV/soiling) and re-evaluate under applicable DSS. Indicative relief: ~120–300 μm+.
  • CAT-5 (by condition/location): Between-pane/inaccessible by parallax, integrity indicators (active cracks/pane movement), or confirmed functional-coating loss on the surface to be worked → CAT-5.
  • CAT is appearance-based; acceptance is separate under VIS-A at 12/36/72 in. Do not abrade to “force” film removal during classification.

Differentiation & Mis-ID Pitfalls (Informative)

  • vs. Hydrophobic coating mismatch halo (Ch.06.02): Coating mismatch halos are on intentional glass coatings and show water-behavior edges unrelated to masonry geometry; silane migration halos align with treated substrate lines/weep paths.
  • vs. Efflorescence-associated attack (Ch.02.03): Efflorescence presents feathered salt blooms and grainy etch beneath; silane halos read oily/iridescent veil with SC-0/SC-1 and less granular raking response.
  • vs. Mineral staining/etch (Ch.03): Mineral issues track spray arcs/rings and may show ring halos; silane halos align with substrate treatment geometry and often soil-load preference along the band.
  • vs. Residue films (R-family): General detergents/soot films lack strong geometric correlation to treated masonry lines and often clear more uniformly at reveal.
  • vs. Coating anomalies (Co-family): Functional coating rub/patchiness is tied to coated faces and manufacturing/handling; migration halos originate from post-installation chemical treatment on adjacent porous materials.

Evidence Package(Documentation Requirements) (Normative)

  • Photo set (VIS): 12 / 36 / 72 in, normal + oblique; include raking macros of the halo edge and interior veil; add context frames showing treated masonry/stone, masking lines, weep paths. Record distance/angle in-frame.
  • MSRT result: One light, non-marring pass on a clean test patch within the halo; record SC-class (SC-0/SC-1/SC-2). Polymer stylus if a coating is suspected.
  • Forms: Pane ID; product family & surface numbering; worked surface Y/N; functional coating present on worked surface? (Y/N/Unknown); reveal status; lighting/time; geometry checklist; photos attached.
  • Acceptance split: Post-restoration acceptance per VIS-A §6; classification ≠ acceptance. Coated-face appearance rules apply per VIS §6.2.e.

Reporting Language (Template)

  • Ch.06.01 Silane/Siloxane Migration Halo — Linear band/halo aligned with [masonry/stone treatment line or weep path] on surface #___; post-reveal test patch shows [SC-0/SC-1]; visible at [12/36/72 in] under VIS geometry. Morphology: oily/iridescent veil, soft interior, tide-line edge; no chip-flank sparkle, no discrete pepper. Classification: CAT-[1/2/3/4] by relief/visibility; CAT-5 if between-pane, integrity cues, or coating-side loss on the surface to be worked. Forms + photo set attached; acceptance per VIS-A §6.
References & Related Links

Informative references and related internal links for context only. Product acceptance remains governed by the applicable project specifications, referenced product standards, and GlassRenu VIS/DSS procedures.

DSS-Ch.06.02

Hydrophobic Coating Mismatch Halo

DSS-Ch.06.02
Hydrophobic Coating Mismatch Halo
(Chemical/interaction — on-glass hydrophobic coating applied/removed unevenly; water-behavior edge, optical halo/veil ± shallow micro-texture)

Classification & Scope (Normative)

Hydrophobic coating mismatch halo is an appearance change caused by uneven application, partial removal, or edge-lap of an on-glass hydrophobic coating (e.g., rain-repellent, DIY nano-sealant). The result is a water-behavior discontinuity and an optical halo/veil at the boundary between coated and uncoated (or differently coated) zones; long UV/soil exposure may leave very shallow micro-texture at the boundary. Classification is appearance-only per VIS (method-agnostic). Inspect after Non-Invasive Reveal under VIS lighting/geometry; record surface numbering and worked-surface status. If the worked surface is a functional factory coating, see coated-face acceptance limits (VIS §6.2.e).

Typical Presentation (Informative)

  • Sharp arc/rectangle/roll-stop lines or hand-wipe arcs seen as darker/lighter halos in specular view; often mirrors applicator paths (pad/cloth/roller).
  • Water-break test reveals different wetting angles: beads tightly on one side, sheets on the other.
  • Over time, the boundary may become a “dirty tide line,” with preferential soil load where chemistry differs.

Field Identification Cues (Normative)

  • Surface-catch class (MSRT)
  • Typically SC-0 (film/wetting difference only).
  • SC-1 (slight) can appear on aged/UV-baked boundaries where organics cross-link with dust/soot; SC-2 uncommon.
  • Perform one light, non-marring pass on a revealed test patch; use a polymer stylus if a functional coating is suspected. MSRT supports classification only.
  • Visual signature
  • Crisp boundary geometry that tracks application (arcs, rectangles, roll starts/stops, cloth edges).
  • Optical halo/veil adjacent to the line; no chip-flank sparkle (not mechanical) and no discrete pits/nodules (not hot-particle).
  • Functional cue (water behavior).
  • Contact-angle contrast (beading vs. sheeting) straddling the line. Document with controlled misting photos (do not flood IGU edges).
  • Viewing / lighting
  • Evaluate clean & dry at 12 / 36 / 72 in, normal and oblique sweep (~60°–120°); use raking light for veil/boundary. Record distance/angle in-frame. Add wetting test images as supplemental evidence (see forms).
  • Location / access
  • Record pane ID and surface numbering (#1–#4; laminate-internal); if fixed parallax indicates between-pane wetting contrast (e.g., factory low-E vs. cavity contaminant), classify CAT-5 by location and refer.
  • Mechanism cue (context)
  • Presence/history of consumer/hydrophobic coatings, contractor “sealants” on glass, partial removal, or mock-ups. Look for applicator tools and masking patterns.

Severity & CAT Mapping (Normative)

  • Assign CAT by visibility impact and MSRT after reveal. Depth values are indicative—field measurement not required.
  • CAT-1 (Benign / non-relief): Water-behavior edge/optical halo only; SC-0; visible mainly at angle or with wetting test. Indicative relief: 0–10 μm (optical).
  • CAT-2 (Light): Persistent halo/veil with slight SC-1 at aged boundary; limited impact at standard view. Indicative relief: ~10–40 μm.
  • CAT-3 (Moderate): Broader boundary zones legible at standard distance (dirty tide line, non-uniform sheen) with SC-1→SC-2. Indicative relief: ~40–120 μm.
  • CAT-4 (Severe): Rare for hydrophobics alone; if extensive matte fields occur, consider mixed chemistry (alkaline + coating residue + UV/soiling) and re-evaluate under applicable DSS. Indicative relief: ~120–300 μm+.
  • CAT-5 (by condition/location): Between-pane/inaccessible by parallax, integrity indicators, or confirmed functional-coating loss on the surface to be worked → CAT-5.
  • CAT is appearance-based; acceptance is separate under VIS-A at 12/36/72 in. For factory functional coated faces, see VIS §6.2.e (appearance on worked coated surfaces).

Differentiation & Mis-ID Pitfalls (Informative)

  • vs. Silane/siloxane migration halo (Ch.06.01): Migration halos align with masonry treatment lines/weep paths; hydrophobic mismatch halos align with applicator geometry on the glass field and are confirmed by wetting contrast.
  • vs. Mineral staining/etch (Ch.03): Mineral issues show rings/runs and modeled micro-texture; mismatch halos are sharp wetting edges with usually SC-0 substrate.
  • vs. Residue films (R-family): General films lack sharp water-behavior lines and often clear uniformly at reveal.
  • vs. Coating anomalies (Co-family manufacturing): Factory coating rub/patchiness follows production/handling logic and may appear on #2/#3 faces; hydrophobic mismatch is field-applied and resides on the exposed face.

Evidence Package(Documentation Requirements) (Normative)

  • Photo set (VIS): 12 / 36 / 72 in, normal + oblique; include raking macros of the boundary line and adjacent veil. Record distance/angle in-frame.
  • Wetting behavior documentation (supplemental). Light mist test across the boundary; photograph immediate beading/sheeting contrast. Avoid flooding edges/IGU seals.
  • MSRT result: One light, non-marring pass on a clean test patch at/near the boundary; record SC-class (SC-0/SC-1/SC-2). Polymer stylus if a factory functional coating may be present.
  • Forms: Pane ID; product family & surface numbering; worked surface Y/N; functional coating present on worked surface? (Y/N/Unknown); reveal status; lighting/time; geometry checklist; wetting test photos attached.
  • Acceptance split: Post-restoration acceptance per VIS-A §6; classification ≠ acceptance. Coated-face appearance rules apply per VIS §6.2.e when the worked surface is a factory functional coating.

Reporting Language (Template)

  • Ch.06.02 Hydrophobic Coating Mismatch Halo — Sharp wetting-behavior boundary with optical halo on surface #___; mist test shows beading vs. sheeting across the line. Post-reveal test patch reads [SC-0/SC-1]; visible at [12/36/72 in] under VIS geometry. Morphology: roll/cloth arc or edge-lap line, no chip-flank sparkle, no discrete pepper. Classification: CAT-[1/2/3/4] by visibility/SC-class; CAT-5 if between-pane, integrity cues, or coating-side loss on the surface to be worked. Forms + photo + wetting documentation attached; acceptance per VIS-A §6.
References & Related Links

Informative references and related internal links for context only. Product acceptance remains governed by the applicable project specifications, referenced product standards, and GlassRenu VIS/DSS procedures.

DSS-Ch.06.03

Anti-Graffiti Coating Ghost (chemically altered)

DSS-Ch.06.03
Anti-Graffiti Coating Ghost (chemically altered)
(Chemical/interaction — altered or partially removed sacrificial/permanent barrier; optical veil/patchiness ± shallow micro-texture, boundary lap lines)

Classification & Scope (Normative)

Anti-graffiti coating ghost is an appearance change on glass resulting from application, partial removal, or chemical alteration of anti-graffiti barrier products (sacrificial wax/polymer films or “permanent” polysiloxane/fluoropolymer systems). After cleaning events (alkaline/solvent/oxidizer) or weathering, the barrier can leave optical veils, patch maps, edge laps, and in aged cases very shallow micro-texture within affected zones. Classification is appearance-only per VIS (method-agnostic). Inspect after Non-Invasive Reveal under VIS lighting/geometry; record surface numbering and worked-surface status. Treat unknown residues as chemical exposure zones; document per site safety.

Typical Presentation (Informative)

  • Patchy sheen with rectilinear or roller/cloth arcs reflecting prior application/removal paths; edge-lap lines and holidays (“missed” islands) may be visible.
  • Water-behavior contrast (beading vs. sheeting) across patch boundaries if hydrophobic character remains.
  • Aged or chemically attacked films can show dirty tide lines (preferential soil load) and, at raking, very fine modeled micro-texture.

Field Identification Cues (Normative)

  • Surface-catch class (MSRT)
  • Commonly SC-0 (film/wetting difference only).
  • SC-1 (slight) may appear on aged / cross-linked or chemically attacked zones; SC-2 uncommon.
  • Perform one light, non-marring pass on a revealed test patch (substrate) only; polymer stylus if a factory functional coating may be present. MSRT supports classification only.
  • Visual signature
  • Application geometry: roller stops, cloth arcs, rectangular mask lines, or overlap seams; optical veil/patch within boundaries.
  • No chip-flank sparkle (not mechanical scoring); no discrete fused nodules/pits (not hot-particle).
  • Functional cue (optional wetting test).
  • Light mist test may reveal contact-angle contrast across the ghost boundary (beading on treated side). Photograph immediately; avoid flooding IGU edges.
  • Viewing / lighting
  • Evaluate clean & dry at 12 / 36 / 72 in, normal incidence and oblique sweep (~60°–120°); use raking light for boundary/veil readability. Record distances/angles in-frame.
  • Location / access
  • Record pane ID and surface numbering (#1–#4; laminate-internal). If fixed parallax indicates between-pane condition (cavity contamination), classify CAT-5 by location and refer.
  • Mechanism cue (context)
  • Evidence of graffiti response (tags, removal notes), contractor logs citing anti-graffiti products, pressure-washing / chemical removal, or remaining masking lines.

Severity & CAT Mapping (Normative)

  • Assign CAT by visibility impact and MSRT after reveal. Depth values are indicative—field measurement not required.
  • CAT-1 (Benign / non-relief): Optical veil/patchiness or wetting contrast only; SC-0; visible mainly in angle/raking. Indicative relief: 0–10 μm (optical).
  • CAT-2 (Light): Persistent halo/patch with SC-1 on aged/altered zones; limited impact at standard view. Indicative relief: ~10–40 μm.
  • CAT-3 (Moderate): Broader patch map / edge-lap network legible at standard distance; SC-1 → SC-2 in most affected areas. Indicative relief: ~40–120 μm.
  • CAT-4 (Severe): Rare for anti-graffiti alone; where pronounced matte fields or widespread micro-texture exist, consider mixed chemistry (alkali/oxidizer stacks) and re-evaluate under applicable DSS. Indicative relief: ~120–300 μm+.
  • CAT-5 (by condition/location): Between-pane/inaccessible by parallax, integrity indicators (active cracks/pane movement), or confirmed functional-coating loss on the surface to be worked → CAT-5.
  • CAT is appearance-based; acceptance is separate under VIS-A at 12/36/72 in. For factory functional coated faces, see VIS §6.2.e (appearance on worked coated surfaces).

Differentiation & Mis-ID Pitfalls (Informative)

  • vs. Hydrophobic coating mismatch (Ch.06.02): Both show wetting edges; mismatch halos track consumer hydrophobics with crisp arcs/blocks across open glass fields; anti-graffiti ghosts often correlate with graffiti-adjacent zones and removal patterns (roller/brush rectangles, pressure-wash fans).
  • vs. Silane/siloxane migration (Ch.06.01): Migration halos align to masonry treatment geometry/weep paths; anti-graffiti ghosts align to glass-only application/removal and graffiti events.
  • vs. Mineral staining/etch (Ch.03): Mineral phenomena show rings/runs and may exhibit modeled micro-texture within those footprints; ghosts exhibit boundary maps from coating work, often with wetting contrast.
  • vs. Residue films (R-family): General films lack distinct application geometry and wetting discontinuities.
  • vs. Coating anomalies (Co-family manufacturing): Factory coating rub/patchiness resides typically on #2/#3 faces and follows production/handling logic; anti-graffiti ghosts are field-applied on the exposed face and correlate with graffiti mitigation.

Evidence Package(Documentation Requirements) (Normative)

  • Photo set (VIS): 12 / 36 / 72 in, normal + oblique; include raking macros of edge-lap lines, patch interiors, and any holiday regions; add context frames (tag remnants, masking, equipment). Record distance/angle in-frame.
  • Wetting behavior documentation (supplemental). Light mist test straddling a boundary; photograph immediate beading/sheeting contrast. Avoid flooding edges/IGU seals.
  • MSRT result: One light, non-marring pass on a clean test patch; record SC-class (SC-0/SC-1/SC-2). Polymer stylus if a factory functional coating may be present.
  • Forms: Pane ID; product family & surface numbering; worked surface Y/N; functional coating present on worked surface? (Y/N/Unknown); reveal status; lighting/time; geometry checklist; wetting test photos attached.
  • Acceptance split: Post-restoration acceptance per VIS-A §6; classification ≠ acceptance. Coated-face appearance rules apply per VIS §6.2.e when the worked surface is a factory functional coating.

Reporting Language (Template)

  • Ch.06.03 Anti-Graffiti Coating Ghost (chemically altered) — Patch/edge-lap map with optical veil on surface #___; mist test shows wetting contrast across boundaries. Post-reveal test patch reads [SC-0/SC-1]; visible at [12/36/72 in] under VIS geometry. Morphology: roller/cloth arcs, rectangular mask lines, holidays; no chip-flank sparkle, no discrete pepper. Classification: CAT-[1/2/3/4] by visibility and SC-class; CAT-5 if between-pane, integrity cues, or coating-side loss on the surface to be worked. Forms + photo + wetting documentation attached; acceptance per VIS-A §6.
References & Related Links

Informative references and related internal links for context only. Product acceptance remains governed by the applicable project specifications, referenced product standards, and GlassRenu VIS/DSS procedures.

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