Damage Specification Standards 2026

DSS-U
Unknown/Mixed Mechanisms

Draft v1.0

DSS-U Page Overview

DSS-U identifies unknown, mixed, or insufficiently diagnostic glass appearance conditions where the visible evidence does not cleanly resolve into a single DSS family. These entries include hybrid chemical–mechanical fields, modeled micro-texture with embedded particulates, halos without central features, directional patterns with intermittent chip flanks, and broad low-contrast milky fields.

Use this page with GlassRenu VIS-A / VIS-DA, the applicable product specifications, and related DSS family pages. DSS-U is intended to preserve disciplined documentation when mechanism certainty is low, while directing the technician toward component reclassification if chemical, mechanical, residue, coating, thermal, environmental, assembly/internal, or vandalism signatures later become dominant.

Table of Contents

Page Resources

U.01 Mixed & Undetermined

References & Citations

View DSS-U Reference Summary

The following references support the unknown, mixed-mechanism, haze, residue, particulate, environmental, chemical, and mechanical-context distinctions used throughout DSS-U. Individual DSS entries include their own collapsed reference footers with the most relevant sources and internal cross-links.

U.01

Mixed & Undetermined

DSS-U.01.01

Mixed Chemical–Mechanical Field (Etch + Track / Hybrid Presentation)

DSS-U.01.01
Mixed Chemical–Mechanical Field (Etch + Track / Hybrid Presentation)
(Mixed mechanism — overlapping chemical alteration and mechanical abrasion/scoring; modeled micro-texture with superposed linear tracks or scuffs; halos/runs from chemistry plus chip-flank sparkle in lines; SC-1 across etched field with SC-2 along mechanical strokes)

Classification & Scope (Normative)

Mixed chemical–mechanical field is an appearance change on glass where chemical alteration (acid/alkali/mineral etch or residue-induced micro-texture) coexists with and/or is overlain by mechanical actions (scraper/razor, pad swirls, directional scuffs, or line scoring). The result is a hybrid field in which modeled matte or haloed zones intermix with linear tracks having chip-flank features. Classification is appearance-only per VIS (method-agnostic). Inspect after Non-Invasive Reveal under VIS lighting/geometry; record surface numbering and worked-surface status.

Typical Presentation (Informative)

  • Low-contrast matte or haloed area (chemical history) with superposed lines that show chip-flank sparkle in raking (mechanical).
  • Run legs/meniscus rings from chemistry crossing or underpinning straight or arced tool paths.
  • Patchy sheen shift with directional webbing from attempted cleaning/restoration over chemically altered substrate.

Field Identification Cues (Normative)

Surface-catch class (MSRT)

  • SC-1 broadly within the chemically altered field (incipient micro-texture).
  • SC-2 along mechanical lines/tracks (distinct interruption with chip-flank feel).
  • Perform one light, non-marring pass on a small revealed test patch—sample both the matte field and the linear features. Use a polymer stylus if a functional coating is suspected. MSRT supports classification only.

Visual signature

  • Modeled, non-directional micro-texture (chemical) plus directional lines/scuffs (mechanical).
  • Chemical artifacts: halos, meniscus rims, drip mapping; Mechanical artifacts: straightedge alignment, uniform arc radius, cross-hatch, chip-flank sparkle.
  • No fused nodules (not hot particle unless co-present—then classify that component separately).

Viewing / lighting

Evaluate clean & dry at 12 / 36 / 72 in, normal and oblique sweep (~60°–120°); utilize raking to separate field matte from line sparkle. Record distances/angles in-frame.

Location / access

Record pane ID and surface numbering (#1–#4; laminate-internal). Typically on exposed faces; between-pane by parallax on #2/#3 → CAT-5 by location.

Mechanism cue (context)

  • Construction or post-construction cleaning where acid/alkali/mineral incidents were followed by scraper or abrasive pad use.
  • Evidence of masonry wash, cement slurry, hard water or acid markers, plus razor scoring or pad swirl attempts to “remove” the chemical effect.

Severity & CAT Mapping (Normative)

  • Assign CAT by visibility at acceptance geometry and MSRT. Depth values are indicative—field measurement not required.
  • CAT-2 (Light): Small hybrid zone where field shows SC-1 (subtle matte) and lines are faint SC-1–SC-2, with limited standard-view impact. Indicative relief: ~10–40 μm (field) with ~20–60 μm (lines).
  • CAT-3 (Moderate): Pane-noticeable hybrid: field matte legible at standard distance (SC-1) with multiple SC-2 tracks (chip flanks evident). Indicative relief: ~40–120 μm (field) plus ~60–150 μm (lines).
  • CAT-4 (Severe): Wide-area chemical matte combined with dense/Deep mechanical scoring visible at standard and wide-field; SC-2 prevalent along lines. Indicative relief: ~120–300+ μm local maxima in lines; field matte in ~80–180 μm range.

Reclassify components when dominant:

  • Chemical halo/rings/etch without mechanical tracks → classify under Ch.01/Ch.02/Ch.03 as appropriate.
  • Predominantly linear scoring with chip flanks, minimal chemical cues → M.01/M.02 families.
  • Fused nodules/pits present → add Th.01 component; if it dominates, classify there.
  • CAT-5 (by condition/location): Between-pane/inaccessible, 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” a response during classification.

Differentiation & Mis-ID Pitfalls (Informative)

  • vs. Pure mineral system (Ch.03): Mineral alone presents ringed halos/etch without chip-flank lines. Mixed fields show both haloed matte and sparkling line edges.
  • vs. Pure abrasion fields (M.02): Abrasion swirls/webs lack chemical run/meniscus artifacts and typically exhibit uniform directionality.
  • vs. Coating anomalies (Co): Coating patchiness is planar on coated faces and lacks mechanical chip flanks; mixed fields reveal distinct line relief.
  • vs. Hot particle (Th.01): Hot particle produces discrete pits/fused nodules; mixed fields show etched matte + mechanical lines, not peppered fusion unless co-present.

Evidence Package (Documentation Requirements) (Normative)

  • Photo set (VIS): 12 / 36 / 72 in, normal + oblique; raking macros that distinctly show (a) field matte / halos / runs and (b) chip-flank sparkle of lines; overlays or paired frames to demonstrate co-location. Record distance/angle in-frame.
  • MSRT results (substrate): After a small reveal test patch, perform one light, non-marring pass through field (record SC-1) and line (record SC-2), plus adjacent control (SC-0).
  • Forms: Pane ID; product family & surface numbering; worked surface Y/N; functional coating 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 when the worked surface is a factory functional coating.

Reporting Language (Template)

U.01.01 Mixed Chemical–Mechanical Field — Modeled matte/halo with superposed linear tracks on surface #___; post-reveal test patch yields SC-1 in field and SC-2 along lines; visible at [12/36/72 in] under VIS geometry. Morphology: chemical halos/runs + chip-flank sparkle, no fused nodules observed. Classification: CAT-[2/3/4] by visibility and SC-class; component reclassification per notes if one mechanism dominates; CAT-5 if between-pane 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-U.01.02

Modeled Micro-Texture with Embedded Particulates (Uncertain Chemistry)

DSS-U.01.02
Modeled Micro-Texture with Embedded Particulates (Uncertain Chemistry)
(Mixed/unknown mechanism — low-contrast matte with fine embedded or partially embedded specks; may result from chemical softening plus particulate impingement/setting; SC-1 broadly in field, isolated SC-2 at raised particulates or micro-divots)

Classification & Scope (Normative)

Modeled micro-texture with embedded particulates is an appearance change in which a subtle, non-directional matte field is accompanied by discrete specks that appear embedded or partially seated in the surface. The presentation suggests chemical softening/attack (acidic, alkaline, or mineral) combined with particle deposition/impingement, but the exact chemistry is uncertain. Classification is appearance-only per VIS (method-agnostic). Inspect after Non-Invasive Reveal under VIS lighting/geometry; record surface numbering and worked-surface status.

Typical Presentation (Informative)

  • Low-contrast “milky” modeling over a patch or panel with peppered fine dots (dark or light) scattered within the field.
  • Specks range from <0.5 mm to ~2 mm apparent diameter; some show tiny shadows or micro-divots at center under raking.
  • Often no gravity-driven runs or wipe paths; field edges can be soft/irregular.

Field Identification Cues (Normative)

Surface-catch class (MSRT)

  • SC-1 across the modeled field (incipient micro-texture).
  • SC-2 (pin-point) at individual raised particulates or micro-divots where a stylus crosses a protrusion or craterlet.
  • Perform one light, non-marring pass on a small revealed test patch, sampling (a) clean glass control, (b) field matrix, and (c) several specks. Use a polymer stylus if a functional coating is suspected. MSRT supports classification only.

Visual signature

  • Non-directional matte (no swirl/line patterning) with random speck distribution; specks may be dark (entrained fines) or light (etched pin-craters).
  • No chip-flank linear grooves (not scoring); no fused hemispherical nodules typical of hot particle if true fusion is absent—verify carefully under raking.
  • Under raking, some specks show tiny radial micro-chipping or a minute depression.

Viewing / lighting

Evaluate clean & dry at 12 / 36 / 72 in, normal and oblique sweep (~60°–120°); use low-angle raking and specular reflection to separate matte field from speck relief. Record distances/angles in-frame.

Location / access

Record pane ID and surface numbering (#1–#4; laminate-internal). Common on outboard (#1) in construction/industrial exposures; between-pane mapping by parallax on #2/#3 → CAT-5 by location.

Mechanism cue (context)

Nearby cement/mortar work, industrial fallout, spray booths, road/rail dust, or cool night dew cycles that could set fines into a chemically softened surface. Lack of welding/grinding activity argues against hot particle as the dominant cause.

Severity & CAT Mapping (Normative)

  • Assign CAT by visibility at acceptance geometry and MSRT. Depth values are indicative—field measurement not required.
  • CAT-2 (Light): Small patch; SC-1 matrix with sparse specks (few per 100 cm²); limited standard-view impact. Indicative relief: field ~10–40 μm, speck high/low points ~20–60 μm.
  • CAT-3 (Moderate): Pane-noticeable patch/panel; SC-1 matrix with numerous specks (tens per 100 cm²) legible at standard distance. Indicative relief: field ~40–120 μm, specks ~60–150 μm.
  • CAT-4 (Severe): Wide-area field with dense peppering visible at standard and wide-field views; frequent SC-2 pin-points; occasional micro-divots. Indicative relief: field ~120–200 μm, local speck maxima ~150–300+ μm.

Reclassify when (component rules):

  • Discrete fused hemispherical beads with metallic tint → Th.01.02 grinder spark embed.
  • Crystalline ring halos / drip geometry → Ch.03 mineral system (Deposits/Staining/Etching).
  • Uniform granular frost within mask edges → V.01.01 abrasive blast.
  • Linear grooves with chip-flank sparkle → M.01 scoring / M.02 abrasion fields.
  • 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. Do not abrade to “force” a response during classification.

Differentiation & Mis-ID Pitfalls (Informative)

  • vs. Hot particle peppering (Th.01.02): Hot particle shows fused, often metallic-colored nodules and distinct craters; this condition often has non-fused fines or very shallow micro-divots without metallic cues.
  • vs. Dust-storm micro-pitting (E.02.02): Eolian pitting is directionally biased (wind-ward) and frequently gradient-based; U.01.02 lacks strong directionality and pairs with modeled matte.
  • vs. Mineral etch (Ch.03.03): Mineral etch displays ring/flow halos; U.01.02 specks are random, with no consistent drip/run geometry.
  • vs. Coating anomalies (Co): Coating issues are planar/patchy, face-specific, and do not present embedded specks; confirm coated face before attribution.

Evidence Package (Documentation Requirements) (Normative)

  • Photo set (VIS): 12 / 36 / 72 in, normal + oblique; raking macros isolating field matte and multiple specks (include one with apparent micro-divot); overview frames showing extent and uniformity. Record distance/angle in-frame.
  • MSRT results: After a small reveal test patch, record SC-class for control (SC-0), field matrix (SC-1), and specks (SC-2 where present).
  • Forms: Pane ID; product family & surface numbering; worked surface Y/N; functional coating 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 when the worked surface is a factory functional coating.

Reporting Language (Template)

U.01.02 Modeled Micro-Texture with Embedded Particulates — Low-contrast matte field with scattered embedded/partially embedded specks on surface #___; post-reveal test patch shows SC-1 matrix and SC-2 at select specks; visible at [12/36/72 in] under VIS geometry. Morphology: non-directional modeling, random peppering, no fused metallic nodules, no linear chip-flank grooves. Classification: CAT-[2/3/4] by visibility and SC-class; reclassify per notes if hot-particle, mineral, blast, or abrasion signatures dominate; CAT-5 if between-pane 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-U.01.03

Halo without Central Feature (Unknown Chemistry)

DSS-U.01.03
Halo without Central Feature (Unknown Chemistry)
(Unknown mechanism — annular rings/ovals with no obvious central nucleus; evaporative/deposition rim remains while core is visually clear; typically SC-0 at core and SC-0–SC-1 on rim; reclassify to mineral/surfactant/sealant families if diagnostic cues present)

Classification & Scope (Normative)

Halo without central feature is an appearance change presenting as a ring or oval band whose center is not visibly occupied by residue or defect. The annulus is presumed to result from edge-biased deposition during wetting/evaporation, surfactant Marangoni flow, or migration from adjacent materials, but the controlling chemistry is not yet identified. Classification is appearance-only per VIS (method-agnostic). Inspect after Non-Invasive Reveal under VIS lighting/geometry; record surface numbering and worked-surface status.

Typical Presentation (Informative)

  • Discrete rings/ovals (single or clustered) ranging 10–150 mm+ diameter; ring width 1–10 mm.
  • Variable contrast: faint sheen shift to light-toned rim; sometimes slight dark edge against reflections.
  • No obvious seed or particulate at the center; multiple halos may partially overlap.

Field Identification Cues (Normative)

Surface-catch class (MSRT)

  • Core: generally SC-0 (no relief).
  • Rim: SC-0 if purely film; SC-1 where very shallow micro-texture or fine crystalloid is present; SC-2 implies misclassification—evaluate for mineral etch (Ch.03.03) or hot particle craters if present.
  • Perform one light, non-marring pass across core → rim → outside on a small revealed test patch. Use polymer stylus if a functional coating is suspected. MSRT supports classification only.

Visual signature

  • Annular band with cleaner center; no chip-flank sparkle (not scoring), no fused nodules (not hot particle).
  • Under raking: rim shows sheen discontinuity or fine granularity; core is optically continuous with surrounding glass.

Viewing / lighting

Evaluate clean & dry at 12 / 36 / 72 in, normal and oblique sweep (~60°–120°); use raking to locate rim density and to confirm feature absence at the center. Record distances/angles in-frame.

Location / access

Record pane ID and surface numbering (#1–#4; laminate-internal). Often on outboard (#1) (dew/droplet drying), but may occur on inboard (#4) near sprays/aerosols. Between-pane appearance on #2/#3 via parallax → CAT-5 by location.

Mechanism cue (context)

Mist/spray usage, detergent or additive residues, nearby silicone/EPDM, roof/metal runoff atomization, or condensation cycles. Lack of drip legs favors isolated droplet history over sheet flow.

Severity & CAT Mapping (Normative)

  • Assign CAT by visibility at acceptance geometry and MSRT after a reveal patch. Depth values are indicative—field measurement not required.
  • CAT-1 (Benign / non-relief): Faint annular halo; SC-0 rim, SC-0 core; visible mainly in raking/angle; lifts on reveal patch. Indicative relief: 0–10 μm (film only).
  • CAT-2 (Light): Persistent rim post-reveal with localized SC-1 (incipient micro-texture or very fine crystalloid); minimal standard-view impact. Indicative relief: ~10–40 μm at rim.
  • CAT-3 (Moderate): Multiple rings/panels legible at standard distance; SC-1 consistent around rims; suggests recurrent cycles or additive-laden droplets. Indicative relief: ~40–120 μm at rim.

Reclassify when (diagnostic cues present):

  • White/grey crystalline rim, facet sparkle, or etched inner band → Ch.03 Mineral system (Deposits/Staining/Etching subtype).
  • Iridescent, rainbow-thin rim tracking wipe geometry → R.04.01 Detergent/Surfactant film.
  • Oily clear ring near PVC/EPDM contact → R.05.02 Plasticizer migration or R.05.01 EPDM rub if dark.
  • Brown/black tonal rim below upstream materials → E.04.03 Curtain wall runoff staining.
  • 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. Do not abrade to “force” a response during classification.

Differentiation & Mis-ID Pitfalls (Informative)

  • vs. Mineral spot/etch rings (Ch.03): Mineral rings often show crystalline texture and may leave true etch (SC-1→SC-2) after reveal; U.01.03 halos can be film-only (SC-0) with no inner etch.
  • vs. Surfactant islands (R.04.01): Surfactant halos show thin-film colors and align with wipe paths; U.01.03 rings are isolated droplet-like without path context.
  • vs. Silicone/siloxane halos (Ch.06.01 / R.01.01 proximity): Silicone halos often adjacent to sealant lines and resist wetting conspicuously; U.01.03 may occur mid-pane and show weaker wetting anomaly.
  • vs. Coating anomalies (Co): Coating patchiness is planar on coated faces and not annular; verify face identity before attribution.

Evidence Package (Documentation Requirements) (Normative)

  • Photo set (VIS): 12 / 36 / 72 in, normal + oblique; raking macros of rim segment and core; include mist/wetting test frame to show wetting response across rim vs. core where permitted. Record distance/angle in-frame.
  • MSRT results: After a small reveal test patch, record SC-class at core (SC-0), rim (SC-0/SC-1), and outside control (SC-0).
  • Forms: Pane ID; product family & surface numbering; worked surface Y/N; functional coating 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 when the worked surface is a factory functional coating.

Reporting Language (Template)

U.01.03 Halo without Central Feature — Isolated annular ring with clear core on surface #___; post-reveal test patch shows [rim SC-0/SC-1] / core SC-0; visible at [12/36/72 in] under VIS geometry. Morphology: annular band, no chip-flank grooves, no fused nodules. Classification: CAT-[1/2/3] by visibility and SC-class; reclassify to Ch.03 (mineral), R.04.01 (surfactant), or R.05.02 (plasticizer) if diagnostic cues present; CAT-5 if between-pane 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-U.01.04

Directional Patterning with Intermittent Chip Flanks (Uncertain Tool/Pad)

DSS-U.01.04
Directional Patterning with Intermittent Chip Flanks (Uncertain Tool/Pad)
(Unknown/mixed mechanism — directional lines/arcs with periodic edge sparkle and variable relief; suggests intermittent hard-point contact within an otherwise pad/cloth motion; SC-1 along most paths with localized SC-2 “spikes” at higher-pressure segments or entrained particulates)

Classification & Scope (Normative)

Directional patterning with intermittent chip flanks is an appearance change characterized by linear or arced paths (often repeating in lanes or sweeps) where most of the path reads as shallow abrasion (SC-1) but localized segments exhibit chip-flank sparkle (SC-2) indicative of momentary hard-point contact (entrained grit, damaged pad edge, nicked squeegee, or tool corner). Motion geometry may reflect hand arcs, DA/pad sweeps, straightedge assists, or repetitive maintenance strokes. Classification is appearance-only per VIS (method-agnostic). Inspect after Non-Invasive Reveal under VIS lighting/geometry; record surface numbering and worked-surface status.

Typical Presentation (Informative)

  • Ribbon-like lanes or overlapped arcs with mostly matte/scuff appearance, punctuated by bright sparkles at discrete segments (the “spikes”).
  • Stroke alignment: parallel passes, consistent radius arcs, or start/stop hesitation marks; lane spacing matches pad diameter or arm span.
  • No fused nodules; no uniform granular frost; not purely random—paths show operator rhythm.

Field Identification Cues (Normative)

Surface-catch class (MSRT)

  • Predominantly SC-1 along the abrasion path (shallow micro-texture).
  • SC-2 at intermittent sparkle points where a hard particle/edge dug briefly (micro-chipping visible under raking).
  • Perform one light, non-marring pass on a small revealed test patch crossing (a) matte path and (b) sparkle nodes; record both responses. Use a polymer stylus if a functional coating is suspected. MSRT supports classification only.

Visual signature

  • Directional continuity (lanes/arcs) with periodic edge sparkle only at nodes; between nodes, path appears soft, scuffed, or hazy.
  • Chip flanks, when present, are short and localized, often at stroke apex, entry/exit, or overlaps.
  • No meniscus rings/runs (argues against chemical-only); no continuous incised groove (argues against pure scribing).

Viewing / lighting

Evaluate clean & dry at 12 / 36 / 72 in, normal and oblique sweep (~60°–120°); use low-angle raking to make sparkle nodes pop and to read stroke rhythm. Record distances/angles in-frame.

Location / access

Record pane ID and surface numbering (#1–#4; laminate-internal). Common on exposed faces in post-construction cleaning or attempted restoration. Between-pane by parallax on #2/#3 → CAT-5 by location.

Mechanism cue (context)

Abrasive pad/cloth used over dust, DA/polisher with contaminated interface, squeegee with nicked blade, or straightedge with grit. May follow attempts to “correct” chemical haze—hence mixed origin.

Severity & CAT Mapping (Normative)

  • Assign CAT by visibility at acceptance geometry and MSRT. Depth values are indicative—field measurement not required.
  • CAT-2 (Light): Few lanes; nodes infrequent; SC-1 predominant with rare SC-2 pin-points; minimal standard-view impact. Indicative relief: path ~10–40 μm; nodes ~20–60 μm.
  • CAT-3 (Moderate): Multiple lanes or dense arcs legible at standard distance; regular SC-2 nodes at overlaps/apexes. Indicative relief: path ~40–120 μm; nodes ~60–150 μm.
  • CAT-4 (Severe): Wide-area patterning across panels, frequent SC-2 nodes, occasional short incised segments; pane appearance compromised at standard and wide-field views. Indicative relief: path ~120–200 μm; local node maxima ~150–300+ μm.

Reclassify when (dominance clarifies mechanism):

  • Chemical halos/runs/meniscus dominate with scarce directionality → Ch.01/Ch.02/Ch.03 families.
  • Continuous grooves with persistent chip flanks → M.01 Linear scoring.
  • Uniform swirl fields without discrete chip-sparkle nodes → M.02 Abrasion swirls/pad trails.
  • Fused metallic peppering in or along lanes → add Th.01.02 Hot particle component.
  • 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. Do not abrade to “force” a response during classification.

Differentiation & Mis-ID Pitfalls (Informative)

  • vs. M.02 Abrasion fields: M.02 shows broad directional haze or swirl webs with consistent SC-1 and lacks discrete SC-2 nodes.
  • vs. M.01 Scoring: Scoring yields continuous sharp grooves with chip flanks along most of the line, not intermittent.
  • vs. V.01.02 Scribed marks: Scribing forms intentional letters/icons with consistent groove relief; U.01.04 shows maintenance-like paths and pressure-dependent nodes.
  • vs. Ch.03 Mineral etch: Mineral systems show ringed halos and non-directional etch tied to wetting; U.01.04 is directional with operator rhythm.

Evidence Package (Documentation Requirements) (Normative)

  • Photo set (VIS): 12 / 36 / 72 in, normal + oblique; raking macros capturing (a) matte path and (b) sparkle node; overview frames to show lane spacing/rhythm. Record distance/angle in-frame.
  • MSRT results: After a small reveal test patch, record SC-class along path (SC-1), at node (SC-2), and outside control (SC-0).
  • Forms: Pane ID; product family & surface numbering; worked surface Y/N; functional coating 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 when the worked surface is a factory functional coating.

Reporting Language (Template)

U.01.04 Directional Patterning with Intermittent Chip Flanks — Parallel lanes/arcs with localized sparkle nodes on surface #___; post-reveal test patch shows SC-1 along paths and SC-2 at nodes; visible at [12/36/72 in] under VIS geometry. Morphology: maintenance-like stroke rhythm, pressure-dependent chip flanks at overlaps/apexes, no fused nodules, no continuous incised groove. Classification: CAT-[2/3/4] by visibility and SC-pattern; reclassify per notes if chemical, scoring, or pure abrasion signatures dominate; CAT-5 if between-pane 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-U.01.05

Non-Directional Milky Field, Low Contrast (Undetermined)

DSS-U.01.05
Non-Directional Milky Field, Low Contrast (Undetermined)
(Unknown mechanism — broad low-contrast haze without obvious directionality, rings, runs, or discrete particulates; may reflect weathering, aged films, or incipient micro-texture; typically SC-0 to SC-1 across the field)

Classification & Scope (Normative)

Non-directional milky field (low contrast) is an appearance change characterized by a broad, subtle, “milky” veil over part or all of a lite without clear directional patterning, annular halos, runs/drips, or discrete peppering/pits. Possible contributors include aged organic films, very early environmental weathering, soft chemical exposure short of distinct etch, or legacy maintenance residues. Because the controlling mechanism is undetermined, this item is classified appearance-only per VIS (method-agnostic). Inspect after Non-Invasive Reveal under VIS lighting/geometry; record surface numbering and worked-surface status.

Typical Presentation (Informative)

  • Low-contrast “milkiness” that reduces specular snap but lacks lines/swirl, ring/halo geometry, or distinct specks.
  • Field edges are often soft or ill-defined (gradual fade into clear glass).
  • More visible at oblique angles and under raking light than at normal incidence.

Field Identification Cues (Normative)

Surface-catch class (MSRT)

  • Frequently SC-0 (film-on-top or purely optical veil).
  • SC-1 where incipient micro-texture is present (very shallow relief detectable only by careful pass).
  • Perform one light, non-marring pass on a small revealed test patch within the field and on adjacent clear control. Use a polymer stylus if a functional coating is suspected. MSRT supports classification only.

Visual signature

  • Uniform or gently graded haze; no chip-flank sparkle, no discrete pits, no meniscus rims/runs.
  • Wetting behavior may show subtle contrast (patches that bead/sheet differently).

Viewing / lighting

Evaluate clean & dry at 12 / 36 / 72 in under normal and oblique sweep (~60°–120°); employ low-angle raking to confirm absence of lines/rings. Record distances/angles in-frame.

Location / access

Record pane ID and surface numbering (#1–#4; laminate-internal). Observed on outboard (#1) (weathering exposure) and inboard (#4) (maintenance films). Between-pane by parallax on #2/#3 → CAT-5 by location.

Mechanism cue (context)

History of intermittent cleaning, detergent/additive use, nearby HVAC/kitchen aerosols, or marine/industrial atmospheres without discrete incident reports.

Severity & CAT Mapping (Normative)

  • Assign CAT by visibility at acceptance geometry and MSRT after a reveal patch. Depth values are indicative—field measurement not required.
  • CAT-1 (Benign / non-relief): Subtle veil visible mainly at oblique/raking; SC-0; clears on reveal patch or reduces markedly. Indicative relief: 0–10 μm (optical/film only).
  • CAT-2 (Light): Persistent low-contrast milkiness post-reveal with localized SC-1; limited impact at standard distance. Indicative relief: ~10–40 μm.
  • CAT-3 (Moderate): Pane-noticeable haze at standard distance, SC-1 consistent across field; indicates dwell/aging or incipient micro-texture. Indicative relief: ~40–120 μm.

Reclassify when (diagnostic cues emerge):

  • Ringed halos/edge crystals → Ch.03 Mineral system (Deposits/Staining/Etching).
  • Directional swirls/lanes → M.02 Abrasion fields.
  • Embedded peppering/pitlets → U.01.02 or Th.01.02 (if fused metallic).
  • Planar patchiness on a coated face → Co family after confirming coated surface.
  • 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. Do not abrade to “force” a response during classification.

Differentiation & Mis-ID Pitfalls (Informative)

  • vs. Surfactant/detergent film (R.04.01): Surfactant films often show iridescent colors and wipe path geometry; U.01.05 lacks pathing and may respond weakly to reveal.
  • vs. Atmospheric matte (E.01.02): Atmospheric matte may bias to edges/rivulets; U.01.05 often appears mid-field with soft boundaries.
  • vs. Coating anomalies (Co): Coating issues are face-specific and planar; confirm face identity and look for lot-wide repetition.
  • vs. Mineral etch (Ch.03.03): Mineral etch exhibits rings/runs and crystalline cues; U.01.05 lacks those geometries.

Evidence Package (Documentation Requirements) (Normative)

  • Photo set (VIS): 12 / 36 / 72 in, normal + oblique; raking macros to demonstrate absence of lines/rings/pits; a wetting response frame (where permitted) to show sheet/bead contrast. Record distance/angle in-frame.
  • MSRT results: After a small reveal test patch, record SC-class for field (SC-0/SC-1) and adjacent control (SC-0).
  • Forms: Pane ID; product family & surface numbering; worked surface Y/N; functional coating 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 when the worked surface is a factory functional coating.

Reporting Language (Template)

U.01.05 Non-Directional Milky Field (Undetermined) — Broad low-contrast haze without lines/rings/pits on surface #___; post-reveal test patch shows [SC-0/SC-1] with adjacent control SC-0; visible at [12/36/72 in] under VIS geometry. Morphology: uniform/graded milkiness, no chip-flank sparkle, no discrete peppering, no meniscus geometry. Classification: CAT-[1/2/3] by visibility and SC-class; reclassify per notes if mineral, abrasion, embedded particulate, or coating signatures are later confirmed; CAT-5 if between-pane 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.

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