Damage Specification Standards 2026

DSS-P
Processing/Manufacturing Features

Draft v1.0

P.01 Heat‑Treated Glass Features

P.01.01 Roller wave (periodic flatness deviation)
P.01.02 Bow/warp (global shape)
P.01.03 Quench/aniso patterning (polarization‑visible)
P.01.04 Roller pickup/ghost (line pattern; pyrolytic lines)
P.01.05 Edge kink / localized warp

P.02 Float & Raw Glass Features

P.02.01 Tin‑side haze / surface “side” effects
P.02.02 Seeds/blisters (entrapped gas)
P.02.03 Stones/knots (inclusions)
P.02.04 Ream/cord / striae (optical inhomogeneity)
P.02.05 Draw or float swirl (optical patterning)

P.03 Fabrication & Finishing

P.03.01 Seamed/arris edge texture (as‑processed)
P.03.02 Edge grind/polish pattern (factory)
P.03.03 Cutting skid lines (factory micro‑lines)
P.03.04 Drill/slot “exit lip” (acceptable edge artifact)
P.03.05 Patterned/textured glass relief (design)

P.04 Specialty/Decorative Systems

P.04.01 Ceramic frit pattern boundaries (design)
P.04.02 Laminated interlayer pattern/print (design)
P.04.03 Spandrel opacity variation (system tolerance)
P.04.04 Curved/bent glass local thickness/thinning signatures

P.01

Heat‑Treated Glass Features

DSS-P.01.01

Roller Wave (Periodic Flatness Deviation)

DSS-P.01.01
Roller Wave (Periodic Flatness Deviation)
(Processing / Manufacturing Feature — reference; generally not damage)

Definition (Reference)

A periodic flatness deviation characteristic of heat-treated flat glass that appears as bands/undulations in reflection or transmission. It is a factory feature of the product, not a field-induced surface relief defect. For measurement background on optical/roll-wave distortion in heat-treated flat glass, see ASTM C1651 (informative reference noted in VIS).

Typical Presentation (Informative)

Alternating light/dark bands visible across reflections (e.g., mullions, horizon lines), sometimes more apparent at oblique angles.
Uniform across large areas of a lite or series of lites from the same run; not localized like scratches or pits.
Does not respond to Non-Invasive Reveal (cleaning) and shows no surface catch. Use VIS inspection lighting/geometry to visualize consistently.

Field Cues (Normative)

Surface catch (MSRT): none (PVΔ as “damage” ≈ 0 at the surface). Perform one light non-marring pass only to confirm absence of relief.
Morphology: global/periodic flatness effect; no chip flanks, no pits, no modeled micro-texture.
Visibility geometry: evaluate under VIS Section 5—raking/low-angle light as needed, with 12/36/72 in distances and normal + oblique sweep.

Classification Mapping (Normative)

Not field damage. Do not classify as CAT-1…CAT-4. Roller wave is a processing feature referenced here to prevent misclassification; acceptance of factory flatness/optical quality is governed by the applicable product standards/project specs, not by VIS (which governs post-restoration acceptance).

Indicative Depth (Informative)

N/A as surface relief. Roller wave is flatness/optical deviation; at the glass surface it does not present as a localized relief feature detectable by MSRT. If factory flatness or optical distortion must be quantified, see ASTM C1651 background as noted in VIS (informative).

Differentiation (Informative)

Versus micro-abrasion / pad trails (M.02.01): abrasion presents localized haze or directional swirls and may show slight catch; roller wave is global/periodic and non-tactile.
Versus over-polish/burnish (M.02.04): burnish is a localized appearance change (often directional) and may show a transition edge; roller wave has no transition edge and extends broadly.
Versus modeled micro-texture (chemical etch): chemical etch shows non-linear micro-texture strongest in raking light and can exhibit slight/clear catch at severity; roller wave remains non-tactile and periodic.

Evidence Package (Normative)

Photo set at 12 / 36 / 72 in under VIS geometry; include one frame with straight-line reflection (string line, mullion, horizon) to show periodicity. Note MSRT = none. Record pane IDs and apply surface numbering conventions.

Mis-ID Pitfalls (Informative)

Attempting corrective “spot work” on roller wave—treating it like a scratch field—can introduce visible worked zones and transition edges. VIS explicitly separates classification from acceptance and requires non-invasive pre-inspection cleaning only.

Reporting Language (Template)

“Observed roller wave (factory flatness feature) presenting as periodic reflective banding across lite(s). No surface catch (MSRT). Condition is a processing feature; not classified as field damage under DSS. Inspection performed per VIS §5 (lighting/viewing).”

DSS-P.01.02

Bow / Warp (global shape)

DSS-P.01.02
Bow / Warp (global shape)
(Processing / Manufacturing feature — reference; generally not “damage”)

Definition (Reference)

A pane-scale departure from nominal flatness that manifests as gentle, global curvature (bow) or more complex global shape (warp). It alters the way straight lines reflect or transmit across the entire lite but does not present as localized surface relief at the exposed surface. Use of raking/oblique views and the VIS viewing geometry is for observation only; acceptance of factory flatness/shape is governed by product specifications (e.g., C1036/C1048) rather than VIS post-restoration criteria.

Typical Presentation

Smooth, global bending across the lite; straight building lines or a held straightedge appear uniformly arced in reflection/transmission at normal or oblique view.
No localized “worked area” or ring/edge; no swirl/web patterning.
Often most apparent in large lites, spandrel areas, or heat-treated product family; can be accentuated by façade geometry and lighting. (Observation per VIS inspection distances/angles.)

Field Identification Cues

Surface-catch class:

SC-0 (none). A single light pass of the Manual Surface-Relief Test should not detect a tactile interruption because the condition is pane-scale shape, not a local relief feature. (Use MSRT exactly as defined; single, non-marring pass.)

Visual signature:

Uniform, directionless bending of reflected/transmitted lines at normal and oblique sweep; no “transition edge” or localized boundary.

Location/access:

Whole lite; pertains to the exposed surface being evaluated for observation only.

Differentiation & False Positives

vs. Roller wave (P.01.01): Roller wave is a periodic flatness deviation often seen in heat-treated glass (short-wavelength, repeating banding) and is documented separately; bow/warp is global/low-frequency curvature. Both are factory shape features rather than local surface relief. Use VIS geometry to observe; do not classify as surface damage.
vs. Restoration-induced “lensing” / over-polish: Lensing presents as a localized worked region with a perceivable boundary (transition edge/ring) and may show directional patterning; bow/warp has no boundary and no MSRT catch.
vs. Framing or substrate misalignment: Apparent waviness caused by bent mullions or uneven substrates can mimic global shape issues; confirm with cross-pane comparisons and fixed references at VIS distances/angles.

Classification Mapping (to VIS-DA CAT)

Because bow/warp is a pane-scale shape with SC-0 and no local morphology, it is not a surface-damage category in VIS-DA (§4). If observation confirms only global shape without local relief/morphology, record “Processing Feature — Not Surface Damage (outside CAT-1…4)”. If the apparent anomaly is within an IGU cavity or otherwise inaccessible, record as CAT-5 (out of in-place scope) by location/condition.

Indicative Depth / Relief

Not applicable as a local depth value. Bow/warp is global flatness/shape; no micrometer-scale surface relief is detected at the exposed surface by MSRT (SC-0).

Evidence Package (Documentation Requirements)

Capture per VIS conventions to avoid hyper-scrutiny and to keep records consistent across trades:

Photo set at VIS geometry: 12 in, 36 in, 72 in at normal and oblique sweep; include a straight reference (ruler/edge) in frame when practical; log distance/angle in frame text.
Time discipline: Observe per pane-size time limits from VIS quick card (apply once per distance).
MSRT result: Record SC-0 (none) for bow/warp; do not abrade or repeat passes.
Form fields: Use VIS Appendix X3 checklist—pane IDs, product family, surface numbering, worked surface Y/N, pre-inspection reveal status, lighting notes.

Common Sources / Context (Informative)

Heat-treatment and quench processes; global cooling/handling effects; permissible flatness/shape tolerances addressed by product specifications (C1036/C1048 families). (Product acceptance per project specs; VIS governs post-restoration appearance only.)

Reporting Language (Template)

P.01.02 Bow/Warp (Processing Feature) — Observed global curvature across lite at VIS geometry; MSRT SC-0 (no surface relief). No localized transition edge or directional patterning. Recorded as manufacturing flatness/shape feature; not classified as surface damage under VIS-DA. Product-tolerance acceptance remains per project’s referenced factory standards (e.g., C1036/C1048).

DSS-P.01.03

Quench / Anisotropy Patterning (polarization-visible)

DSS-P.01.03
Quench / Anisotropy Patterning (polarization-visible)
(Processing / Manufacturing feature — reference; generally not “damage”)

Definition (Reference)

A spatial variation in optical response (anisotropy) characteristic of heat-treated glass caused by non-uniform cooling in the quench. It presents as bands, mottling, or “zebra/leopard” tonal shifts that are most evident in reflection/transmission at oblique angles and may be accentuated by polarized viewing. It is a factory feature of the product—not a localized surface-relief defect. For measurement/optics background related to heat-treated glass distortion phenomena, VIS cites ASTM C1651 as informative context.

Typical Presentation (Informative)

Non-directional, pane-scale tone/brightness shifts; may appear banded or patchy across the lite.
Most apparent at oblique sweep under raking/low-angle light; can be seen at normal incidence on some façades; visibility varies with sky conditions and reflections. (Observe using VIS geometry.)
Not localized like a scratch/pit and does not respond to non-invasive reveal (cleaning).

Field Identification Cues (Normative)

Surface-catch class (MSRT):

SC-0 (none). Perform one light, non-marring pass only to confirm no tactile relief; do not abrade or repeat passes.

Visual signature:

Pane-scale mottle/banding without a transition edge; no chip flanks, no pits/craters, no modeled micro-texture typical of chemical etch. Evaluate at 12/36/72 in with normal + oblique sweep under VIS lighting.

Location/access:

Whole-lite appearance feature; pertains to the exposed surface being evaluated for observation only.

Classification Mapping (to VIS-DA) (Normative)

Not field damage. Quench/anisotropy is a processing/optical feature and is not categorized as CAT-1…CAT-4. When observation confirms SC-0 with pane-scale signature and no local morphology, record: “Processing Feature — Not Surface Damage (outside CAT).”
If the apparent pattern is inside an IGU cavity or otherwise inaccessible, document fixed parallax and record CAT-5 (out of in-place scope by location).

Indicative Depth / Relief (Informative)

Not applicable as a local surface-relief quantity. Anisotropy is an optical (stress/retardation) phenomenon from heat-treat; no micrometre relief is detected at the exposed surface by MSRT (SC-0). For broader heat-treated optical context, VIS references ASTM C1651 (informative).

Differentiation & False Positives (Informative)

vs. Roller wave (P.01.01): Roller wave shows periodic banding (short wavelength) tied to roll contact; anisotropy can be mottled/banded but is polarization-sensitive and not periodic. Both remain SC-0 (non-tactile).
vs. Bow/warp (P.01.02): Bow/warp is global shape (straight lines bend smoothly); anisotropy is optical mottle/banding without uniform curvature. Both lack transition edges and surface catch.
vs. Low-E coating rub/patchiness (Co.01.02): Coating rub produces localized sheen/color shifts and can create a worked boundary or directional scuffs. VIS acceptance prohibits coating anomalies on the worked surface; record coating presence in Forms:

Evidence Package (Documentation Requirements) (Normative)

Photo set at VIS geometry: 12 / 36 / 72 in, normal + oblique; include a straight-line reflection (mullion/string line) where practical; note whether raking was used.
MSRT result: Record SC-0; one pass only; no abrasion.
Forms: Pane ID; surface numbering (#1–#4; laminate-internal); coating present Y/N/Unknown; non-invasive reveal completed (Y/N); lighting notes/time.

Mis-ID Pitfalls (Informative)

Attempting localized “spot-work” on anisotropy can introduce a visible worked region and transition edge. VIS separates classification from post-restoration acceptance; do not conflate factory features with repairable surface defects.

Reporting Language (Template)

P.01.03 Quench/Anisotropy Patterning (Processing Feature) — Pane-scale optical mottle/banding observed at VIS geometry; MSRT = SC-0 (no surface relief). No localized transition edge or chip-flank morphology. Recorded as manufacturing optical feature; not classified as surface damage under VIS-DA. If pattern is within IGU cavity (fixed parallax), record CAT-5 and refer per project protocol.

DSS-P.01.04

Roller Pickup / “Line Ghost” (pyrolytic line pattern)

DSS-P.01.04
Roller Pickup / “Line Ghost” (pyrolytic line pattern)
(Processing / Manufacturing feature — reference; generally not “damage”)

Definition (Reference)

A linear appearance feature associated with pyrolytic (hard-coat) deposition on the float line, observed as faint, conveyor-parallel lines or “ghosts” that repeat across a lite. It is a factory/processing signature of the coating run, not a localized surface-relief defect. For coating product context see the VIS normative references list (ASTM C1376).

Typical Presentation (Informative)

Fine, straight, parallel lines visible in reflection/transmission—often aligned with float/conveyor direction.
Tonal/sheen change without a perceivable edge; visibility varies with oblique sweep and raking light per VIS geometry.
Does not respond to non-invasive reveal (cleaning); pattern is uniform over broad areas rather than localized like scoring.

Field Identification Cues (Normative)

Surface-catch class (MSRT):

SC-0 (none). Perform one light, non-marring pass only; do not abrade or repeat passes.

Morphology:

Pane-scale linear appearance without chip flanks/pits; no transition edge typical of worked regions.

Viewing:

Use VIS distances 12/36/72 in; evaluate at normal and oblique sweep (~60°–120°) under raking/low-angle light.

Classification Mapping (to VIS-DA) (Normative)

Not field damage When observation confirms SC-0 with conveyor-parallel, pane-scale lines and no local relief/morphology, record: “Processing Feature — Not Surface Damage (outside CAT-1…CAT-4).”
If the pattern is confirmed inside an IGU cavity (fixed parallax), record CAT-5 (out of in-place scope by location) and refer per project protocol.

Indicative Depth / Relief (Informative)

Not applicable as a local surface-relief quantity. Roller pickup/line ghosts are appearance signatures of coating manufacture; no micrometre-scale relief is detected by MSRT (SC-0).

Differentiation & False Positives (Informative)

vs. Scraper/razor scoring (M.01.01): Scoring shows clear surface catch and often bright chip flanks under raking light; roller pickup is non-tactile and lacks fracture flanks.
vs. Coating rub/patchiness (Co.01.02): Rub marks present localized sheen shift and may read with a perimeter or directionality; roller pickup is uniform/parallel to conveyance with no worked boundary. Acceptance prohibits coating anomalies on the worked surface.
vs. Micro-abrasion swirls (M.02.01): Swirls appear curvilinear/cross-hatched and can show slight catch; roller pickup remains straight, parallel, SC-0.

Evidence Package (Documentation Requirements) (Normative)

Photo set per VIS: capture at 12 / 36 / 72 in, normal + oblique; include a straight reference (mullion/string line) when practical to emphasize parallelism; note if raking used.
MSRT result: Record SC-0 (none); one pass only; non-marring.
Forms: Pane ID, surface numbering (#1–#4; laminate-internal), coating present on worked surface? (Y/N/Unknown), reveal status, lighting notes/time.
Acceptance split: Remember VIS governs post-restoration acceptance; factory features are addressed by product standards/project specs; do not conflate.

Coating Caution (Normative)

Where a functional coating is on the worked surface, no coating anomaly may be introduced (VIS §6.2.e). Note presence; do not alter coatings during evaluation.

Reporting Language (Template)

P.01.04 Roller Pickup / Line Ghost (Processing Feature) — Conveyor-parallel, pane-scale linear appearance observed at VIS geometry; MSRT = SC-0 (no surface relief). No transition edge or chip-flank morphology. Recorded as manufacturing/coating feature; not categorized as surface damage under VIS-DA. If fixed parallax indicates cavity location, classify CAT-5 and refer per project protocol.

DSS-P.01.05

Edge Kink / Localized Warp

DSS-P.01.05
Edge Kink / Localized Warp
(Processing / Manufacturing feature — reference; generally not “damage”)

Definition (Reference)

A localized departure from flatness concentrated near an edge or corner of a lite—commonly a small “kink” or short-wavelength warp attributable to manufacturing/handling processes (e.g., heat-treat cooling, conveyor/edge support, post-process handling). It alters straight-line reflections/transmission near the edge zone but does not present as a discrete surface-relief defect at the exposed surface. VIS geometry is used to observe only; factory flatness/shape acceptance is governed by product standards/project specs, not by VIS post-restoration acceptance.

Typical Presentation (Informative)

Local edge zone where mullion/horizon reflections kink or bend over a short run; effect diminishes a few inches into the lite.
No visible transition edge of a worked area; pattern is shape-related, not a ring or halo.
Non-responsive to Non-Invasive Reveal; persists after clean/dry. Evaluate at VIS normal + oblique sweep and 12/36/72 in distances.

Field Identification Cues (Normative)

Surface-catch class (MSRT):

SC-0 (none). Make one light, non-marring pass; no tactile interruption should be felt because this is shape, not local relief. Do not repeat/abrade.

Morphology:

Localized flatness/shape deviation near edge; no chip flanks, pits, or modeled micro-texture. Classification remains observation-based; do not confuse with edge chipping (see M.03).

Viewing/lighting:

Use VIS raking light and oblique sweep (~60°–120°) to read the optical bend; document at 12/36/72 in per VIS.

Classification Mapping (to VIS-DA) (Normative)

Not field damage. When SC-0 and morphology indicate a shape feature (no local relief), record “Processing Feature — Not Surface Damage (outside CAT-1…CAT-4)”.
If apparent distortion is determined to be inside an IGU cavity or otherwise inaccessible, document fixed parallax and record CAT-5 (out of in-place scope by location/condition).

Indicative Depth / Relief (Informative)

N/A as a local surface-relief metric. Edge kink/localized warp is a shape/flatness issue; no micrometre relief is detected at the exposed surface via MSRT (SC-0).

Differentiation & False Positives (Informative)

vs. Bow/Warp (P.01.02): Bow/warp is global curvature across the pane; edge kink is localized near the perimeter. Both are SC-0 and non-relief.
vs. Roller Wave (P.01.01): Roller wave is periodic and often extends across the lite; edge kink is a short, non-periodic local bend. Both are factory shape features.
vs. Edge micro-chipping / clamshell (M.03): Edge damage shows fracture morphology and, when accessible, may show clear catch; edge kink shows no catch and no fracture cues.
vs. Frame/setting block distortion: Bent mullions or improper setting can mimic edge warp. Compare across adjacent lites and capture reference straight-edge in photos at VIS geometry.

Evidence Package (Documentation Requirements) (Normative)

Photo set (VIS): 12 / 36 / 72 in, normal + oblique; include a straight reference (string line/mullion/edge rule) skimming the affected perimeter to show local bend; note raking used Y/N.
MSRT: Record SC-0 (none); one pass only; non-marring.
Forms: Pane ID; surface numbering (#1–#4; laminate-internal), product family, coating on worked surface? (Y/N/Unknown), reveal status, lighting notes/time.
Acceptance split: VIS governs post-restoration acceptance; factory tolerance/product specs govern flatness/shape at manufacture. Do not conflate.

Reporting Language (Template)

P.01.05 Edge Kink / Localized Warp (Processing Feature) — Local perimeter flatness deviation observed at VIS geometry; MSRT = SC-0 (no surface relief). No transition edge or fracture morphology. Recorded as manufacturing/shape feature; not categorized as surface damage under VIS-DA. If fixed parallax confirms cavity location, record CAT-5 and refer per project protocol

P.02

Float & Raw Glass Features

DSS-P.02.01

Tin-Side Haze / Surface “Side” Effects

DSS-P.02.01
Tin-Side Haze / Surface “Side” Effects
(Float & raw glass feature — reference; generally not “damage”)

Definition (Reference)

Subtle appearance differences between float-glass surfaces—commonly a faint haze/iridescence or slightly different “sheen” on the tin-side versus the air-side—arising from normal float manufacture. These are factory surface-side signatures, not field-induced surface-relief defects. Observe with VIS lighting and viewing geometry for consistency; product acceptance for factory surfaces is separate from post-restoration acceptance under VIS.

Typical Presentation (Informative)

Very low-contrast haze or color cast that is pane-wide or area-wide rather than localized.
Can be more evident at oblique sweep and under raking light; often disappears or diminishes at other angles.
No ring/boundary and no response to Non-Invasive Reveal (clean/dry).

Field Identification Cues (Normative)

Surface-catch class (MSRT):

SC-0 (none). Perform one light, non-marring pass per VIS §5.5; do not abrade or repeat passes. Tin-side haze is an appearance-side effect, not local relief.

Visual signature:

Uniform, non-directional variation in tone/shine; lacks directional patterning and transition edge.

Viewing/lighting:

Inspect at 12 / 36 / 72 in with normal incidence and oblique sweep (~60°–120°) under raking light.

Location/access:

Pertains to the exposed surface under evaluation; record surface numbering (#1–#4 / laminate-internal) when IGUs/laminates are present.

Classification Mapping (to VIS-DA) (Normative)

Not field damage. If observation confirms SC-0 with pane-scale, non-directional side effect and no local morphology, record: “Processing Feature — Not Surface Damage (outside CAT-1…CAT-4).”
If a look-alike cue is confirmed between panes (fixed parallax in an IGU) or otherwise inaccessible, classify as CAT-5 (out of in-place scope) by location/condition.

Indicative Depth / Relief (Informative)

Not applicable as a local relief quantity. Tin-side/air-side differences are appearance-side phenomena of float manufacture; no micrometre-scale relief is detected by MSRT (SC-0).

Differentiation & False Positives (Informative)

vs. Micro-abrasion swirls (M.02.01): Abrasion presents directional or curvilinear texture and may read slight catch; tin-side haze is non-directional and SC-0.
vs. Coating anomaly on worked surface (Co.01/Co.03): Coating rub/patchiness is localized and constrained by a worked boundary; VIS acceptance prohibits visible coating anomalies on the worked surface.
vs. Chemical micro-etch (Ch.03.03): Chemical etch exhibits modeled micro-texture and may escalate to slight/clear catch as severity increases; tin-side haze remains SC-0 and lacks modeled texture/rings.

Evidence Package (Documentation Requirements) (Normative)

Photo set (VIS): Capture at 12 / 36 / 72 in, normal + oblique; include raking usage in notes; avoid filters that alter appearance.
MSRT result: Record SC-0; one pass only; non-marring.
Forms: Pane ID; surface numbering; worked surface Y/N; coating present on worked surface? (Y/N/Unknown); reveal status; lighting/time; inspection geometry.
Acceptance split: VIS governs post-restoration acceptance; factory side-effects are addressed by product standards/project specs. Do not conflate.

Mis-ID Pitfalls (Informative)

Attempting localized “correction” of a factory side effect can create a worked region with a transition edge, which VIS disallows at acceptance for CAT-0…CAT-4.

Reporting Language (Template)

P.02.01 Tin-side haze / surface side effect (Processing Feature) — Pane-scale, non-directional appearance difference consistent with float surface-side signature; MSRT = SC-0 (no surface relief). No transition edge or chip-flank morphology. Recorded as manufacturing surface-side feature; not categorized as surface damage under VIS-DA. If fixed parallax indicates cavity location, record CAT-5 and refer per project protocol.

DSS-P.02.02

Seeds / Blisters (entrapped gas)

DSS-P.02.02
Seeds / Blisters (entrapped gas)
(Float & raw glass feature — reference; generally not “damage”)

Definition (Reference)

Seeds/blisters are gas inclusions formed during melting/float manufacture, appearing as encapsulated bubbles within the glass body. When fully encapsulated, they are a manufacturing feature and not a surface-relief defect. Evaluate using VIS lighting and viewing geometry for observation consistency; product acceptance for factory inclusions is separate from post-restoration acceptance under VIS.

Typical Presentation (Informative)

Discrete, rounded or lenticular spots that remain fixed with parallax relative to the glass thickness (no boundary ring or worked perimeter).
Most noticeable at oblique sweep; may exhibit slight optical lensing; does not respond to Non-Invasive Reveal (clean/dry).

Field Identification Cues (Normative)

Surface-catch class (MSRT):

Fully encapsulated seed/blister: SC-0 (none) — a single, light, non-marring pass detects no tactile relief because the feature is within the glass, not on the exposed surface. Do not abrade or repeat.
Open blister / burst inclusion: If the bubble has broken to the surface, it will read as a local pit/crater and may present clear catch; classify by morphology (see CAT-3/4 cues; see “Pit / Crater” term).

Visual signature:

Encapsulated: small, stable point feature with no transition edge; no chip flanks; fixed location regardless of wipe/clean.
Open: local pit/crater possibly with a faint halo under raking light.

Viewing/lighting:

Inspect at 12 / 36 / 72 in with normal incidence and oblique sweep (~60°–120°) under raking light per VIS.

Location/access:

Record surface numbering (#1–#4; laminate-internal); encapsulated features reside within the lite thickness (not between panes). If a similar cue is found to be between panes (fixed parallax in an IGU), treat as out of in-place scope.

Classification Mapping (to VIS-DA) (Normative)

Encapsulated seed/blister (non-relief): Processing Feature — Not Surface Damage (outside CAT-1…CAT-4). Document and proceed per project specifications for factory inclusions.
Open blister / surface pit: Classify by observable morphology and surface-catch (often CAT-3/4 depending on depth cues).
Between-pane or inaccessible condition: If a look-alike defect is confirmed within IGU cavity (fixed parallax) or otherwise out of in-place scope, record CAT-5 and refer per project protocol.

Indicative Depth / Relief (Informative)

Encapsulated: No measurable surface relief at the exposed surface (SC-0).
Open blister: presents as local crater/pit; relief depth varies; use morphology + catch rather than assigning a numeric depth in the field.

Differentiation & False Positives (Informative)

vs. Metallic/paint specks (Residues/Overspray): Residues typically clean/soften with reveal; encapsulated blisters do not.
vs. Micro-abrasion “pepper”: Abrasion fields show directional patterning or webbing and may escalate to slight/clear catch; encapsulated seeds are isolated and SC-0.
vs. Hot-particle pits (Th.01): Thermal pits often exhibit bright chip flanks and clear catch; encapsulated seeds do not. Classify thermal pits per M/Th families.

Evidence Package (Documentation Requirements) (Normative)

Photo set (VIS): 12 / 36 / 72 in, normal + oblique; include raking usage; where practical, capture a fixed reference to demonstrate lack of boundary/working.
MSRT: Record SC-0 for encapsulated features (one pass only; non-marring). If open, record SC-1/SC-2 accordingly.
Forms: Pane ID; surface numbering; worked surface Y/N; coating present on worked surface? (Y/N/Unknown); reveal status; lighting/time.
Acceptance split: VIS governs post-restoration appearance; factory inclusions are governed by product standards/project specs—do not conflate.

Mis-ID Pitfalls (Informative)

Attempting “spot-correction” of an encapsulated seed can introduce a worked region (visible transition edge) that is not permitted at VIS acceptance. Keep classification appearance-only unless an open pit is confirmed.

Reporting Language (Template)

P.02.02 Seeds/Blisters (Processing Feature) — Discrete encapsulated inclusion observed at VIS geometry; MSRT = SC-0 (no surface relief). No transition edge or fracture morphology. Recorded as manufacturing feature; not categorized as surface damage under VIS-DA. If an open pit is present, classify by CAT-3/4 morphology; if a between-pane look-alike is confirmed, record CAT-5 and refer per project protocol.

DSS-P.02.03

Stones / Knots (solid inclusions)

DSS-P.02.03
Stones / Knots (solid inclusions)
(Float & raw glass feature — reference; encapsulated = factory feature; “open” = classify by surface morphology)

Definition (Reference)

Stones/knots are solid inclusions within the glass body (e.g., unmelted batch, refractory fragments) produced during glass manufacture. When fully encapsulated, they are manufacturing features (optical/appearance effects) rather than surface-relief defects. Evaluate with VIS lighting/geometry for consistency; product/factory acceptance is distinct from VIS post-restoration acceptance.

Typical Presentation (Informative)

Discrete, non-gas inclusion often visible as a speck or tiny body with slight lensing/shadow; location appears stable under parallax (moves with the glass, not with the surface reflection).
Pane-wide cleaning (Non-Invasive Reveal) does not change visibility; no wipe-responsive residue film.
If the inclusion breaks the surface (rare), the site presents as a pit/crater with possible chip flanks in raking light.

Field Identification Cues (Normative)

Surface-catch class (MSRT):

Encapsulated stone/knott: SC-0 (none) — one light, non-marring pass finds no tactile relief (feature is subsurface). Do not abrade or repeat passes.
Open (surface-breaking) stone: reads as local pit/crater; expect SC-1/SC-2 depending on depth/edge condition (see CAT-3/4 cues).

Morphology / visual signature:

Encapsulated: no transition edge, no chip flanks, no local modeled micro-texture; discrete point feature.
Open: pit/crater possibly with bright flanks in raking light; may be visible at standard/wide-field views if severe.

Viewing/lighting (use VIS):

Inspect at 12 / 36 / 72 in, normal and oblique sweep (~60°–120°) under raking light; surfaces must be clean/dry.

Location/access:

Record surface numbering (#1–#4; laminate-internal). If a similar cue is confirmed between panes (fixed parallax), record CAT-5 (out of in-place scope by location).

Classification Mapping (to VIS-DA) (Normative)

Encapsulated stone/knott (non-relief): Processing Feature — Not Surface Damage (outside CAT-1…CAT-4); document only.
Open (surface-breaking) stone: classify by observable morphology + surface-catch: often CAT-3 (clear catch; modeled texture/lines nearby) or CAT-4 if rough chip flanks/pits are prominent at standard/wide-field views.
Between-pane/inaccessible look-alike: CAT-5 by location/condition; refer per project protocol.

Indicative Depth / Relief (Informative)

Encapsulated: no measurable surface relief at the exposed surface (SC-0).
Open: relief varies; field classification relies on catch + morphology (pit/crater; chip flanks), not numeric depth.

Differentiation & False Positives (Informative)

vs. Seeds/Blisters (P.02.02): Seeds are gas inclusions; when open, present as craters but often with smoother edges; encapsulated seeds also read SC-0. Stones are solid and more likely to have irregular boundaries if open. (Use MSRT + raking.)
vs. Hot-particle peppering (Th.01): Thermal pits show bright chip flanks and often occur in clusters/fields; classify per CAT-3/4 morphology if present.
vs. Metallic/paint specks (Residues/Overspray): Residues change with Non-Invasive Reveal; true inclusions do not.

Evidence Package (Documentation Requirements) (Normative)

Photo set (VIS): 12 / 36 / 72 in, normal + oblique; include raking usage; where practical, capture a straight-line reflection to show absence of a worked perimeter.
MSRT result: Encapsulated → SC-0; Open → SC-1/SC-2 (record). One pass only; non-marring.
Forms: Pane ID; surface numbering; worked surface Y/N; coating present on worked surface? (Y/N/Unknown); reveal status; lighting/time.
Acceptance split: VIS governs post-restoration appearance; factory inclusion quality is governed by product standards/project specs—do not conflate.

Mis-ID Pitfalls (Informative)

Local “spot-work” on an encapsulated stone can create a worked region with a transition edge, which VIS disallows at acceptance (CAT-0…CAT-4). Keep classification appearance-only unless a surface-breaking pit is confirmed.

Reporting Language (Template)

P.02.03 Stones/Knots (Processing Feature) — Discrete solid inclusion observed at VIS geometry; MSRT = SC-0 (no surface relief). No transition edge or fracture morphology. Recorded as manufacturing inclusion; not categorized as surface damage under VIS-DA. If surface-breaking, classify by CAT-3/4 morphology; if between panes, record CAT-5 and refer per project protocol.

DSS-P.02.04

Ream / Cord / Striae (optical inhomogeneity)

DSS-P.02.04
Ream / Cord / Striae (optical inhomogeneity)
(Float & raw glass feature — reference; generally not “damage”)

Definition (Reference)

Ream/cord/striae are optical inhomogeneities in float glass arising from localized variations in composition/temperature during forming. They present as streaks, swirls, or ribbons that deflect straight-line reflections and alter transmitted/reflected imagery, most apparent at oblique angles. These are factory optical features rather than local surface-relief defects. VIS treats observation under controlled lighting/geometry separately from post-restoration acceptance; measurement background for heat-treated optical distortion phenomena is cited in VIS as ASTM C1651 (informative).

Typical Presentation (Informative)

Pane-scale streaks or swirls (sometimes gently undulating), visible as bending of straight reflections or faint flow patterns; not bounded by a local “worked” edge.
Varies with incidence and polarization; reads strongest under raking light with an oblique sweep and may reduce at normal incidence. (Use VIS geometry.)

Field Identification Cues (Normative)

Surface-catch class (MSRT):

SC-0 (none). Perform one light, non-marring pass per VIS §5.5 to confirm absence of tactile relief; do not abrade or repeat passes. The MSRT is used only to support classification, not acceptance.

Visual signature:

Non-localized optical deflection (straight lines appear bent) or swirled streaks with no transition edge, no chip flanks, and no pits/craters typical of surface damage.

Viewing/lighting:

Evaluate at 12 / 36 / 72 in with normal incidence and oblique sweep (~60°–120°) under raking light; surfaces clean and dry per VIS.

Location/access:

Use surface numbering (#1–#4; laminate-internal) on forms when IGUs/laminates are present.

Classification Mapping (to VIS-DA) (Normative)

Not field damage. When observation confirms SC-0 with pane-scale optical inhomogeneity and no local relief, record: “Processing Feature — Not Surface Damage (outside CAT-1…CAT-4).” VIS separates classification from acceptance and reserves CAT-5 for location/condition out of in-place scope.
If a similar appearance is confirmed between panes (fixed parallax in an IGU) or otherwise inaccessible, record CAT-5 and refer per project protocol.

Indicative Depth / Relief (Informative)

Not applicable as a local relief metric. Ream/cord/striae are optical (refractive index/flow) effects from manufacture; no micrometre-scale relief is detected by MSRT (SC-0).

Differentiation & False Positives (Informative)

vs. Roller wave (P.01.01): Roller wave is periodic flatness deviation from heat-treat; ream/cord are flow-pattern streaks/swirls from float—both are SC-0 optical/shape phenomena; see VIS’s C1651 reference for optical distortion context.
vs. Abrasion fields (M.02): Abrasion shows directional patterning and can escalate to slight/clear catch; ream/cord remain SC-0 with no transition edge.
vs. Coating rub/patchiness (Co.01/Co.03): Coating anomalies tend to be localized with possible worked boundaries and are disallowed on the worked surface at acceptance; ream/cord are pane-scale and not confined by a perimeter.

Evidence Package (Documentation Requirements) (Normative)

Photo set (VIS): 12 / 36 / 72 in, normal + oblique; include raking usage; capture a straight-line reflection (mullion/string line) to show optical bending.
MSRT result: Record SC-0 (none); one pass only; non-marring.
Forms: Pane ID; product family and surface numbering; worked surface Y/N; functional coating present on worked surface? (Y/N/Unknown); reveal status; lighting/time; geometry checklist.
Acceptance split: VIS governs post-restoration acceptance; factory optical features are governed by product standards/project specs; do not conflate.

Mis-ID Pitfalls (Informative)

Attempting localized “spot-work” to “correct” factory optical streaks can introduce a worked region with a visible transition edge, which VIS disallows at acceptance for CAT-0…CAT-4. Keep classification appearance-only for these features

Reporting Language (Template)

P.02.04 Ream/Cord/Striae (Processing Feature) — Pane-scale optical inhomogeneity (streak/swirls) observed at VIS geometry; MSRT = SC-0 (no surface relief). No transition edge or fracture morphology. Recorded as manufacturing optical feature; not categorized as surface damage under VIS-DA. If fixed parallax indicates between-pane location, record CAT-5 and refer per project protocol.

DSS-P.02.05

Draw / Float Swirl (optical patterning)

DSS-P.02.05
Draw / Float Swirl (optical patterning)
(Float & raw glass feature — reference; generally not “damage”)

Definition (Reference)

Pane-scale optical flow patterning—subtle swirls/eddies formed by melt/float-bath flow and composition/temperature variations during manufacture. Presents as low-contrast swirl bands or gentle flow lines that bend straight reflections and modulate sheen, typically strongest at oblique angles/raking light. These are factory optical features, not local surface-relief defects. VIS treats observation under controlled lighting/geometry separately from post-restoration acceptance. For context on optical distortion measurement in heat-treated glass, VIS cites ASTM C1651 informatively.

Typical Presentation (Informative)

Swirled or meandering bands across regions of a lite; no discrete perimeter or worked boundary.
Angle-dependent visibility—stronger in raking light and oblique sweep (~60°–120°); can diminish at normal incidence. Use VIS §5 geometry.

Field Identification Cues (Normative)

Surface-catch class (MSRT): SC-0 (none). Make one light, non-marring pass per VIS §5.5; no tactile interruption because this is optical, not relief. Do not abrade or repeat.
Visual signature: Pane-scale non-directional swirl/flow appearance; no transition edge, no chip flanks, no pits/craters. See VIS definitions for non-directional variation and directional patterning.
Viewing/lighting: Inspect at 12 / 36 / 72 in, normal + oblique sweep, under raking light; surfaces clean/dry (non-invasive reveal).
Location/access: Record surface numbering (#1–#4; laminate-internal) on forms; acceptance pertains to the exposed surface being evaluated.

Classification Mapping (to VIS-DA) (Normative)

Not field damage. If observation confirms SC-0 with pane-scale optical flow and no local relief, record “Processing Feature — Not Surface Damage (outside CAT-1…CAT-4).” VIS keeps classification separate from acceptance; reserve CAT-5 for location/condition out of in-place scope.
Between-pane look-alike: If fixed parallax demonstrates a cavity condition, record CAT-5 and refer per project protocol.

Indicative Depth / Relief (Informative)

Not applicable as a local relief metric. Draw/float swirl is an optical (RI/flow) effect from manufacture; no micrometre-scale relief is detected by MSRT (SC-0).

Differentiation & False Positives (Informative)

vs. Ream/Cord/Striae (P.02.04): Striae often appear as linear ribbon/streak patterns; draw/float swirl tends toward curvilinear “eddies.” Both are SC-0 and pane-scale. (Use same VIS geometry.)
vs. Roller wave (P.01.01): Roller wave is periodic flatness deviation from heat-treat; swirls are non-periodic flow patterns from float. (Optical distortion context: ASTM C1651, informative.)
vs. Abrasion fields (M.02): Abrasion shows directional/web texture and may escalate to slight/clear catch; swirls remain SC-0 with no worked boundary.
vs. Coating rub/patchiness (Co.01/Co.03): Coating anomalies are localized, often tied to the worked surface and disallowed at acceptance on coated surfaces; float swirl is pane-scale and not confined by a perimeter.

Evidence Package (Documentation Requirements) (Normative)

Photo set (VIS): 12 / 36 / 72 in, normal + oblique; note raking usage; capture straight-line reflections (mullion/string) bending across the swirl field.
MSRT result: Record SC-0; one pass only; non-marring.
Forms: Pane ID; product family and surface numbering; worked surface Y/N; functional coating present on worked surface? (Y/N/Unknown); reveal status; lighting/time; geometry checklist.
Acceptance split: VIS governs post-restoration appearance; factory optical features are governed by product standards/project specs—do not conflate.

Mis-ID Pitfalls (Informative)

Localized “spot correction” of factory swirl can create a worked region with a visible transition edge—not permitted at VIS acceptance for CAT-0…CAT-4. Keep classification appearance-only unless a true surface defect is present.

Reporting Language (Template)

P.02.05 Draw/Float Swirl (Processing Feature) — Pane-scale optical flow patterning observed at VIS geometry; MSRT = SC-0 (no surface relief). No transition edge or fracture morphology. Recorded as manufacturing optical feature; not categorized as surface damage under VIS-DA. If fixed parallax indicates between-pane location, record CAT-5 and refer per project protocol.

P.03

Fabrication & Finishing

DSS-P.03.01

Seamed / Arris Edge Texture (as-processed edge finish)

DSS-P.03.01
Seamed / Arris Edge Texture (as-processed edge finish)
(Fabrication & finishing — reference; generally not “damage”)

Definition (Reference)

Seamed/arris edge texture is the factory edge finish produced by light grinding to remove sharpness after cutting. It may appear as a narrow frosted/ground band at the perimeter or as micro-striations normal to the edge. This is a manufacturing edge feature, not a worked-surface defect. Evaluate observations under VIS lighting/geometry; product/ factory acceptance criteria are distinct from post-restoration acceptance governed by VIS.

Typical Presentation (Informative)

Uniform, narrow band (typically a few millimetres wide) of matte/frosted texture along the edge arris; may show fine, parallel grind lines.
Visibility depends on angle/raking light and background contrast; does not change with Non-Invasive Reveal (clean/dry).

Field Identification Cues (Normative)

Surface-catch class (MSRT):

On the face area adjacent to the edge: SC-0 (none) for the factory arris itself (no local worked-surface relief on the face). Perform one light, non-marring pass per VIS §5.5; do not abrade or repeat.

Visual signature:

Non-directional frosted/matte edge band without a transition edge on the face and without chip flanks. (If chip flanks or pits/craters are present on the face, evaluate under M.03/M.04 families.)

Viewing/lighting:

Inspect at 12 / 36 / 72 in using normal incidence and oblique sweep (~60°–120°) with raking light; surfaces clean/dry. Scan edges and corners at each distance.

Location/access:

Document pane ID and surface numbering (#1–#4; laminate-internal) on forms; acceptance pertains to the exposed surface under evaluation.

Classification Mapping (to VIS-DA) (Normative)

Processing feature — not surface damage. When observation confirms uniform factory arris with SC-0 on the face and no transition edge, record “Processing Feature — Not Surface Damage (outside CAT-1…CAT-4).”
Escalate when:
- Edge micro-chips / clamshells propagate onto the face with clear catch or bright flanks → classify per M.03 (edge & corner) at CAT-3/4 by morphology.
- Between-pane/inaccessible cues (fixed parallax in IGU rabbet area) → CAT-5 by location/condition; refer per project protocol.

Indicative Depth / Relief (Informative)

Factory arris is edge-only matte texture; no measurable relief on the face area (SC-0) unless accompanied by chips/pits (then classify by M.03/M.04 morphology rather than assigning numeric depth).

Differentiation & False Positives (Informative)

vs. Abrasion fields on face (M.02): Abrasion shows directional/web texture on the face and can escalate to slight/clear catch; a factory arris remains edge-bound and SC-0 on the face.
vs. Coating anomalies (Co.01/Co.03): Coating rub/patchiness is localized on the worked surface and disallowed at acceptance when coatings are present; factory arris is an edge feature, not a coating change.
vs. Hot-particle peppering (Th.01): Thermal pits present bright chip flanks and clear catch on the face; arris texture does not.

Evidence Package (Documentation Requirements) (Normative)

Photo set (VIS): 12 / 36 / 72 in, normal + oblique; include raking usage; capture one frame showing edge band continuity across a long run to establish factory uniformity.
MSRT result: Record SC-0 on the face adjacent to the arris; one pass only; non-marring.
Forms: Pane ID; product family and surface numbering; worked surface Y/N; functional coating present on worked surface? (Y/N/Unknown); reveal status; lighting/time; geometry checklist.
Acceptance split: VIS governs post-restoration appearance; factory edge finishes follow product standards/project specs—do not conflate.

Mis-ID Pitfalls (Informative)

Attempting to “blend out” the factory edge frost onto the face can create a worked region with a visible transition edge, which VIS disallows at acceptance (CAT-0…CAT-4). Keep classification appearance-only unless face damage is present.

Reporting Language (Template)

P.03.01 Seamed/Arris Edge Texture (Processing Feature) — Uniform factory arris observed; MSRT on face = SC-0 (no surface relief). No transition edge or chip-flank morphology on the face. Recorded as manufacturing edge finish; not categorized as surface damage under VIS-DA. If face chips/pits exist, classify under M.03/M.04 by CAT and morphology; if between-pane cues are involved, record CAT-5 and refer per project protocol.

DSS-P.03.02

Edge Grind / Polish Pattern (factory)

DSS-P.03.02
Edge Grind / Polish Pattern (factory)
(Fabrication & finishing — reference; generally not “damage”)

Definition (Reference)

A factory edge-finish pattern produced by belt/diamond grinding and/or polishing after cutting. It can appear—when viewed from the face—as fine, parallel lineation or a narrow glossy/matte band immediately adjacent to the edge. This is a manufacturing edge feature, not a worked-surface defect on the face. Evaluate under VIS inspection lighting/geometry; post-restoration acceptance is governed by VIS and is distinct from factory/product acceptance.

Typical Presentation (Informative)

Uniform, edge-parallel micro-lines (from grinding) or a narrow high-sheen band (from polish) confined to the edge zone.
Visibility changes with angle and raking light; a Non-Invasive Reveal (clean/dry) does not alter the cue.

Field Identification Cues (Normative)

Surface-catch class (MSRT):

On the face adjacent to the edge, record SC-0 (none)—one light, non-marring pass only; do not abrade or repeat. The MSRT supports classification only (not acceptance).

Visual signature:

Edge-bound, uniform grind/polish appearance, no transition edge on the face, no chip flanks, no pits/craters. If chip flanks or pits are present on the face, evaluate under M.03/M.04 families by morphology.

Viewing/lighting:

Inspect at 12 / 36 / 72 in with normal incidence and oblique sweep (~60°–120°) using raking light; surfaces must be clean and dry per VIS.

Location/access:

Record surface numbering (#1–#4; laminate-internal) on forms; acceptance pertains to the exposed surface being evaluated.

Classification Mapping (to VIS-DA) (Normative)

Processing feature — not surface damage. If observation confirms uniform factory edge finish with SC-0 on the face and no local worked perimeter → record “Processing Feature — Not Surface Damage (outside CAT-1…CAT-4).”

Escalate when:

Face-side micro-chips/clam-shells present with clear catch/bright flanks → classify under M.03 (edge & corner) at CAT-3/4 by morphology.
Between-pane / inaccessible cues (fixed parallax in IGU) → CAT-5 (location/condition), refer per project protocol.

Indicative Depth / Relief (Informative)

Factory grind/polish pattern is edge-finish texture; no measurable relief on the face (SC-0) unless accompanied by chips/pits (then classify by morphology rather than assigning numeric depth).

Differentiation & False Positives (Informative)

vs. Abrasion fields on the face (M.02): Abrasion shows directional/web patterning on the face and may produce slight/clear catch; factory edge finish remains edge-bound and SC-0 on the face.
vs. Fabrication-debris (FD) scratches (M.05): FD marks extend onto the face with linear tracks and may escalate in catch; uniform edge polish does not create face-side tracks.
vs. Coating anomalies (Co.01/Co.03): Coating rub/patchiness is localized on the worked surface and disallowed at acceptance on coated surfaces; factory edge finish is an edge feature, not a coating change.

Evidence Package (Documentation Requirements) (Normative)

Photo set (VIS): 12 / 36 / 72 in, normal + oblique; include raking usage; capture at least one frame showing long-run edge uniformity to establish factory origin.
MSRT result: Record SC-0 on the face; one pass only; non-marring.
Forms: Pane ID; product family and surface numbering; worked surface Y/N; functional coating present on worked surface? (Y/N/Unknown); reveal status; lighting/time; geometry checklist.
Acceptance split: VIS governs post-restoration appearance; factory edge finishes follow product specs—do not conflate factory features with VIS acceptance.

Mis-ID Pitfalls (Informative)

Attempting to “blend” factory edge polish onto the face can create a worked region with a visible transition edge, which VIS disallows at acceptance (CAT-0…CAT-4). Keep classification appearance-only unless face-side damage is present.

Reporting Language (Template)

P.03.02 Edge Grind/Polish Pattern (Processing Feature) — Uniform factory edge finish observed at VIS geometry; MSRT on face = SC-0 (no surface relief). No transition edge or chip-flank morphology on the face. Recorded as manufacturing edge feature; not categorized as surface damage under VIS-DA. If face chips/pits exist, classify under M.03/M.04 by CAT and morphology; if between panes, record CAT-5 and refer per project protocol.

DSS-P.03.03

Cutting Skid Lines (factory micro-lines)

DSS-P.03.03
Cutting Skid Lines (factory micro-lines)
(Fabrication & finishing — reference; generally not “damage”)

Definition (Reference)

Cutting skid lines are fine, short micro-lines generated during score-and-break cutting at the factory (wheel slip or micro-chatter just before/after the primary score). They are usually confined to the edge zone and appear only in raking/oblique views. As a manufacturing artifact, they are not, by themselves, a worked-surface defect on the face. VIS separates observation under controlled lighting/geometry from post-restoration acceptance; treat factory features accordingly.

Typical Presentation (Informative)

Clustered, parallel micro-lines oriented with the cut direction, typically perpendicular to the nearby edge; lengths often a few millimetres.
Edge-proximate and non-localized (no “worked perimeter” ring).
Visibility increases under raking light with oblique sweep; a Non-Invasive Reveal (clean & dry) does not materially change the cue.

Field Identification Cues (Normative)

Surface-catch class (MSRT):

On the face near the edge zone, record SC-0 (none) to SC-1 (slight) only. Perform one light, non-marring pass per VIS §5.5; do not abrade or repeat. On suspected coated faces, prefer a polymer stylus and default to visual cues where any coating risk exists.

Visual signature:

Short, fine, parallel micro-lines confined to the edge zone; no transition edge, no pits/craters, no bright chip flanks typical of mechanical scoring.

Viewing/lighting:

Evaluate at 12 / 36 / 72 in, normal + oblique sweep (~60°–120°) under raking light; surfaces clean & dry.

Location/access:

Log pane ID and surface numbering (#1–#4; laminate-internal) on forms; acceptance pertains to the exposed surface being evaluated.

Classification Mapping (to VIS-DA) (Normative)

Processing feature — not surface damage. If the cue is edge-proximate, uniform, and SC-0/SC-1 with no transition edge or fracture morphology on the face, record “Processing Feature — Not Surface Damage (outside CAT-1…CAT-4).”

Escalate when:

Any clear catch with bright chip flanks or extended linear runs across the face → classify under M.01 (linear scoring/tracks) at CAT-3/4 by morphology.
Indicators show the condition is between panes / inaccessible (fixed parallax in IGU) → CAT-5 by location/condition; refer per project protocol.

Indicative Depth / Relief (Informative)

Factory cutting micro-lines on the face typically register SC-0 to SC-1 (qualitative), implying very shallow relief (sub-micron to low single-micron range). Numeric depth is not required for classification; use MSRT class and morphology.

Differentiation & False Positives (Informative)

vs. Fabrication-debris (FD) scratches (M.05): FD tracks are longer-run lineations that traverse the face (often bands) and may escalate in catch; cutting skid lines are short, edge-zone micro-lines. (Classify FD under M.05.)
vs. Abrasion fields (M.02): Abrasion shows directional/web texture with potential SC-1/SC-2 and broader field extent; cutting skid lines remain discrete and edge-bound.
vs. Coating rub/patchiness (Co.01/Co.03): Coating anomalies are localized changes on the worked surface and are not permitted at acceptance on coated faces; cutting skid lines are manufacturing edge artifacts. Apply VIS §6.2.e for coated surfaces.

Evidence Package (Documentation Requirements) (Normative)

Photo set (VIS): 12 / 36 / 72 in, normal + oblique; include raking frames. Capture at least one oblique macro showing parallel micro-lines in the edge zone and one context frame showing edge continuity.
MSRT result: Record SC-0 / SC-1; one pass only, non-marring; on coated faces prefer polymer stylus.
Forms: Pane ID; product family and surface numbering; worked surface Y/N; functional coating present on worked surface? (Y/N/Unknown); reveal status; lighting/time; geometry checklist.
Acceptance split: VIS post-restoration acceptance governs face appearance; do not conflate factory edge artifacts with VIS acceptance criteria.

Mis-ID Pitfalls (Informative)

Attempting to “blend away” factory edge-zone micro-lines onto the face can create a worked region with a visible transition edge, which VIS disallows at acceptance (CAT-0…CAT-4). Keep classification appearance-only unless face damage is present.

Reporting Language (Template)

P.03.03 Cutting Skid Lines (Processing Feature) — Edge-zone parallel factory micro-lines observed at VIS geometry; MSRT = SC-0/SC-1 (no/trace relief). No transition edge or chip-flank morphology on the face. Recorded as manufacturing artifact; not categorized as surface damage under VIS-DA. If long, tactile lines with bright flanks extend across the face, classify under M.01 by CAT; if between-pane, record CAT-5 and refer per protocol.

DSS-P.03.04

Drill/Slot “Exit Lip” (acceptable edge artifact)

DSS-P.03.04
Drill/Slot “Exit Lip” (acceptable edge artifact)
(Fabrication & finishing — reference; generally not “damage” unless it propagates onto the face)

Definition (Reference)

A localized burr/lip at the exit of a drilled hole or machined slot produced during fabrication when the tool breaks through the ply. Typically confined to the edge of the hole/slot or immediately adjacent edge land, not onto the visible face. Considered a factory edge artifact rather than a worked-surface defect when it does not create a face-side transition edge or chip-flank morphology. Evaluate under VIS lighting/geometry; factory acceptance remains distinct from post-restoration acceptance governed by VIS.

Typical Presentation (Informative)

Narrow circular or crescent lip on the exit side of a hole; short linear lip at a slot exit.
May look matte (micro-ground) or slightly glossy (tool burnish).
Often only visible in raking/oblique views; no effect on the broad face. Use VIS §5 geometry.

Field Identification Cues (Normative)

Surface-catch class (MSRT):

On the face adjacent to the feature: record SC-0 (none)—one light, non-marring pass per VIS §5.5; do not abrade or repeat. On coated faces, prefer a polymer stylus and default to visual cues if any coating risk exists.

Visual signature:

Edge-confined lip at a hole/slot exit with no transition edge on the face; no pits/craters; no bright chip flanks on the face. If chip flanks (micro-chipping) are present on the face, evaluate under edge/corner or drilling-related damage families.

Viewing/lighting:

Inspect at 12 / 36 / 72 in using normal + oblique sweep (~60°–120°) with raking light; surfaces clean/dry per reveal.
Location/access:
Log pane ID and surface numbering (#1–#4; laminate-internal); acceptance pertains to the exposed surface under evaluation.

Classification Mapping (to VIS-DA) (Normative)

Processing feature — not surface damage. When the lip is confined to the hole/slot exit and adjacent edge land with SC-0 on the face and no worked perimeter, record “Processing Feature — Not Surface Damage (outside CAT-1…CAT-4).”

Escalate when:

Face-side micro-chipping or chip flanks propagate from the exit → classify by morphology under M.03 Edge & Corner or M.06 Drilling/Notching-Related at CAT-3/4 (clear catch; rough flanks; pits/craters).
Crack initiation (edge-origin or through-thickness) is observed → document under M.07 Cracking & Fracture; CAT-5 if condition is structural/inaccessible for in-place work.
Between-pane indication (fixed parallax in IGU cavity) → CAT-5 by location/condition; refer per project protocol.

Indicative Depth / Relief (Informative)

The lip is an edge geometry artifact; on the face it typically registers SC-0 (no tactile relief). If face micro-chips are present, they correlate with clear catch and bright flanks (trend CAT-3 → CAT-4 by morphology), not with a uniform “lip.”
Differentiation & False Positives (Informative)
vs. Edge micro-chipping (M.03): Micro-chips show discrete shelling and bright flanks; an exit lip is a continuous burr localized to the hole/slot perimeter. Escalate only if chips propagate onto the face.
vs. Linear scoring (M.01): Scoring forms extended lines across the face and often shows clear catch; an exit lip is peripheral to a hole/slot.
vs. Coating anomalies (Co.01/Co.03): Coating rub/patchiness is localized on the worked surface and disallowed at acceptance on coated faces; an exit lip is an edge fabrication artifact. Apply §6.2.e when coatings are present.

Evidence Package (Documentation Requirements) (Normative)

Photo set (VIS): 12 / 36 / 72 in, normal + oblique; include raking macros showing the exit perimeter and a context frame confirming the lip is edge-confined (no face perimeter/transition edge).
MSRT result: Record SC-0 on the face; one pass only, non-marring; on coated faces, prefer polymer stylus.
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: VIS governs post-restoration appearance; do not conflate a factory exit lip with face-side acceptance requirements. (If restoration is performed near holes/slots, transition edges and chip flanks remain disqualifying for CAT-0…CAT-4.)

Mis-ID Pitfalls (Informative)

Attempting to “blend off” a factory exit lip onto the face can create a worked region with a visible transition edge, which VIS disallows at acceptance. Keep classification appearance-only unless face damage exists; then classify by the appropriate M-series entry.

Reporting Language (Template)

P.03.04 Drill/Slot Exit Lip (Processing Feature) — Localized exit-side burr/lip confined to the hole/slot perimeter; MSRT on face = SC-0 (no relief). No transition edge or chip-flank morphology on the face. Recorded as manufacturing edge artifact; not categorized as surface damage under VIS-DA. If face micro-chipping or cracks are present, classify under M.03/M.06/M.07 by CAT; if between-pane cues exist, record CAT-5 and refer per protocol.

DSS-P.03.05

Patterned / Textured Glass Relief (design)

DSS-P.03.05
Patterned / Textured Glass Relief (design)
(Specialty & decorative — reference; generally not “damage”)

Definition (Reference)

Patterned/textured glass is manufactured with intentional surface relief (e.g., flutes, prismatic or pebbled textures) as an aesthetic/functional design. The relief is inherent to the product, not a worked-surface defect. Evaluate observations under the VIS inspection lighting/geometry; post-restoration acceptance of worked areas is governed by VIS and must not be conflated with factory/product acceptance for decorative glass.

Informative context: industry “how to view decorative glazing” guidance (NGA FB67-20) recognizes that decorative products have intentional textures/patterns and should be viewed with appropriate geometry and expectations.

Typical Presentation (Informative)

Uniform, repeating relief (linear, geometric, pebbled, ribbed), continuous over the lite.
Contrast and apparent “grain” vary with angle and raking light; a non-invasive reveal (clean & dry) does not remove or change the relief.

Field Identification Cues (Normative)

Surface-catch class (MSRT):

On the intended textured face, MSRT will sense design relief; do not abrade. One light, non-marring pass only; on coatings, prefer a polymer stylus or rely on visual morphology + location. MSRT supports classification only (not acceptance).

Visual signature:

Non-directional, uniform relief without a worked transition edge; no chip flanks/pits typical of mechanical scoring or hot-particle attack. Use normal incidence and oblique sweep (~60°–120°) at 12 / 36 / 72 in under raking light.

Location/access:

Record pane ID and surface numbering (#1–#4; laminate-internal); acceptance pertains to the exposed surface under evaluation.

Classification Mapping (to VIS-DA) (Normative)

Processing/design feature — not surface damage. If the observation is uniform product texture with no transition edge and no damage morphology, record “Design Feature — Not Surface Damage (outside CAT-1…CAT-4).”

Escalate when:

A local worked region is visible on the textured face (e.g., a transition edge/ring, local directional patterning, chip flanks or pits/craters). → Classify under M- or Ch- families by morphology and assign CAT per VIS (appearance-only).
The cue shows fixed parallax within an IGU (between-pane). → CAT-5 (out of in-place scope); refer per project protocol.

Indicative Relief (Informative)

Decorative relief height is a product attribute, not a damage depth; numeric depth is not required for classification/acceptance of design texture. Acceptance for any worked area remains appearance-based (no transition edge, no directional patterning at required views).

Differentiation & False Positives (Informative)

vs. Abrasion fields (M.02): Abrasion presents directional/web texture and may produce slight/clear catch; design textures are uniform and lack chip flanks.
vs. Chemical etch (Ch.03/Ch.01): Etch shows modeled micro-texture and can create localization/halos; design texture is consistent and non-localized.
vs. Coating anomalies (Co.01/Co.03): Coating rub/patchiness is a worked-surface anomaly and is not permitted on coated faces at acceptance (VIS §6.2.e). Decorative relief is product geometry, not a coating change.

Evidence Package (Documentation Requirements) (Normative)

Photo set (VIS): 12 / 36 / 72 in, normal + oblique; include raking frames showing uniform texture and context frames proving product continuity (not a localized worked patch).
MSRT result: Record SC class (note: design texture may feel as relief; record without probing). One pass only; non-marring; on suspected coated faces, prefer polymer stylus or rely on visual cues.
Forms: Pane ID; product family and surface numbering; worked surface Y/N; functional coating present on worked surface? (Y/N/Unknown); reveal status; lighting/time; geometry checklist.
Acceptance split: Decorative glass viewing should follow the VIS distances/angles; coating anomalies and transition edges/directional patterning remain disqualifying in worked areas.

Mis-ID Pitfalls (Informative)

“Blending” or polishing a small patch on a textured face to “match” relief can create a worked region with a visible transition edge, which VIS disallows at acceptance. Do not attempt to “flatten” design relief.

Reporting Language (Template)

P.03.05 Patterned/Textured Glass Relief (Design Feature) — Uniform product texture observed at VIS geometry; no transition edge and no damage morphology (no chip flanks/pits). MSRT recorded without probing (supports classification only). Logged as design feature — not surface damage under VIS-DA. If any localized worked patch or coating anomaly is present on the inspected face, classify and evaluate per VIS Sections 4 & 6.

P.04

Specialty/Decorative Systems

DSS-P.04.01

Ceramic Frit Pattern Boundaries (design)

(Specialty / decorative system — reference; generally not “damage”)

DSS-P.04.01
Ceramic Frit Pattern Boundaries (design)
(Specialty / decorative system — reference; generally not “damage”)

Definition (Reference)

Ceramic frit (silk-screened/enamel) is a fired, glass-ceramic coating applied in controlled patterns (e.g., dots, lines, gradients, bands) for solar control, opacity, or aesthetics. Pattern boundaries (dot-matrix edges, band terminations, registration seams) are intentional design features, not worked-surface defects. Observation follows VIS inspection geometry; post-restoration acceptance for any worked area remains distinct from factory/product acceptance.

Typical Presentation (Informative)

Uniform, repeatable geometry (dot pitch, line spacing, edges) that stays consistent across the lite or series.
Angle-dependent contrast: edges may read more strongly in oblique/raking views; a non-invasive reveal (clean & dry) does not change the boundary.
On spandrel/frit bands, transitions may be feathered (dot gradient) or hard-edge by design.

Field Identification Cues (Normative)

Surface-catch class (MSRT):

On the intended frit face, record the MSRT result without probing; run one light, non-marring pass only. Treat frit as product geometry/finish; on coated systems or IGUs default to visual morphology + location if any risk exists. (MSRT supports classification only.)

Visual signature:

Pattern-true edge with no worked transition ring, no chip flanks/pits, and no directional swirl/web typical of mechanical/chemical damage.
Boundary aligns with screen registration or design intent; adjacent glass face shows SC-0 and no perimeter.

Viewing/lighting:

Inspect at 12 / 36 / 72 in, normal + oblique sweep (~60°–120°); use raking to document edge clarity/regularity; surfaces clean & dry (non-invasive reveal).

Location/access:

Log pane ID and surface numbering (#1–#4; laminate-internal). Note if frit is inboard of IGU (#2/#3) or exposed. Acceptance in VIS pertains to the exposed surface being evaluated.

Classification Mapping (to VIS-DA) (Normative)

Design/processing feature — not surface damage. When the observation is a uniform, repeatable frit boundary with no worked-area perimeter and SC-0 on adjacent face, record “Design Feature — Not Surface Damage (outside CAT-1…CAT-4).”

Escalate when:

Frit over-spray / smear / offset appears outside the intended pattern (see Co.05.01 / Co.05.03) or a rub/scuff changes sheen (Co.02.02 / Co.01.01). → Classify under Coating Anomalies by morphology and assign CAT per VIS (appearance-only).
Between-pane indication (fixed parallax at #2/#3 in an IGU) or otherwise inaccessible → CAT-5 by location/condition; refer per project protocol.

Indicative Relief (Informative)

Fired frit typically reads SC-0 at adjacent clear glass; the frit itself may present micro-texture/orange-peel inherent to the product but not a worked transition. Numeric depth is not required for classification; acceptance remains appearance-based in VIS.

Differentiation & False Positives (Informative)

vs. Paint overspray (R.02.01 / Co.05.03): Overspray leaves random, non-registered specks/film beyond design edges; may soften with reveal or show directional deposition. Frit boundaries are registered, uniform.
vs. Coating rub/patchiness (Co.01/Co.02/Co.03): Rubs create sheen shifts or streaks that may have a worked perimeter; VIS disallows anomalies on the worked surface at acceptance. Frit edges do not present a worked ring.
vs. Abrasion fields (M.02): Abrasion shows swirls/web/cross-hatch and can escalate to SC-1/SC-2; frit boundaries remain pattern-true and non-tactile at adjacent clear glass.

Evidence Package (Documentation Requirements) (Normative)

Photo set (VIS): 12 / 36 / 72 in, normal + oblique; include raking macros of the boundary and context frames proving pattern continuity (not a localized worked patch). Note lighting/time and reveal status.
MSRT result: Record SC class at adjacent clear face (avoid probing into frit). One pass only; non-marring. On suspected coated surfaces, prefer polymer stylus or visual-only.
Forms: Pane ID; surface numbering; worked surface Y/N; functional coating present on worked surface? (Y/N/Unknown); geometry checklist; photos attached.
Acceptance split: VIS governs post-restoration appearance (no transition edge/directional patterning in any worked area); factory frit patterning remains a design/product attribute.

Mis-ID Pitfalls (Informative)

Attempting to “blend” a frit boundary to “soften” its appearance will create a worked region on the clear glass with a visible transition edge, which VIS disallows at acceptance (CAT-0…CAT-4). Do not alter design pattern geometry.

Reporting Language (Template)

P.04.01 Ceramic Frit Pattern Boundary (Design Feature) — Uniform, registered frit boundary observed at VIS geometry; adjacent clear face MSRT = SC-0 (no relief). No transition edge, no chip-flank/pit morphology beyond the designed pattern. Logged as design/processing feature — not surface damage under VIS-DA. If over-spray/smear or coating rub is present beyond design edges, classify under Co family by CAT; if between-pane, record CAT-5 and refer per protocol.

DSS-P.04.02

Laminated Interlayer Pattern / Print (design)

DSS-P.04.02
Laminated Interlayer Pattern / Print (design)
(Specialty / decorative system — reference; generally not “damage”)

Definition (Reference)

Laminated glass can incorporate printed, patterned, or decorative interlayers (e.g., ceramic-ink prints on film, colored/gradient PVB/ionoplast, fabric meshes). These visuals reside within the laminate between plies and are intentional design attributes, not worked-surface defects on the exposed face. Product identity and baseline terminology follow ASTM C1172 (laminated architectural flat glass) and are listed normatively in VIS; the ISO 12543 laminated glass series is informative background.

Typical Presentation (Informative)

Uniform, repeatable artwork or tint that is fixed between plies and shows no perimeter/transition edge on the exposed surface.
Apparent contrast varies with angle and raking light; a non-invasive reveal (clean & dry) does not change the printed appearance. Evaluate under VIS geometry.

Field Identification Cues (Normative)

Surface-catch class (MSRT):

On the exposed face, the print is encapsulated; record SC-0 (none) with one light, non-marring pass per VIS §5.5 (supports classification only; do not abrade). Prefer a polymer stylus or visual-only on suspected coated faces.

Visual signature:

Design-true edges and artwork seen through the ply; no worked transition ring on the exposed face; no chip flanks/pits typical of mechanical or hot-particle damage. Confirm by normal incidence and oblique sweep (~60°–120°) at 12 / 36 / 72 in with raking light.

Location / access:

Log pane ID and surface numbering (#1–#4 for IGU cavity-bounding faces; laminate-internal for interlayer-adjacent faces). Acceptance in VIS pertains to the exposed surface only.

Classification Mapping (to VIS-DA) (Normative)

Design/processing feature — not surface damage. If the observation is uniform printed interlayer with SC-0 on the exposed face and no worked perimeter, record “Design Feature — Not Surface Damage (outside CAT-1…CAT-4).”

Escalate when:

A local worked region exists on the exposed face (visible transition edge/ring, directional patterning, chip flanks/pits) → classify under M-/Ch- families by morphology and assign CAT per VIS.
The cue is between panes or within the laminate (i.e., laminate-internal cue) such that it’s inaccessible → CAT-5 by location/condition; document and refer per project protocol.

Indicative Relief / Depth (Informative)

Printed interlayers are encapsulated graphics, not face-side relief; the exposed face registers SC-0. Numeric “depth” is not applicable for design prints; any worked area on the exposed face remains appearance-based under VIS acceptance (no transition edge, no directional patterning at required views).

Differentiation & False Positives (Informative)

vs. Interlayer defects (A.02 family): Bubbles/stringers/edge haze are defect morphologies within the laminate (not design prints) and may trigger CAT-5 by inaccessibility. Design prints are continuous and intentional.
vs. Coating anomalies (Co.01/Co.03): Coating rubs/patchiness are worked-surface anomalies on the exposed face and are disallowed at acceptance when present on the worked surface; design prints are behind the face.
vs. Paint/film overspray (R.02/R.01): Overspray/adhesive films are on the exposed face and can change with reveal; printed interlayers do not change after cleaning.

Evidence Package (Documentation Requirements) (Normative)

Photo set (VIS): 12 / 36 / 72 in, normal + oblique, include raking macros showing artwork through the ply with no face-side perimeter, plus context frames confirming pattern continuity. Record lighting/time and reveal status.
MSRT result: Record SC class on the exposed face (one pass, non-marring). Use polymer stylus or visual-only near coatings.
Forms: Pane ID; surface numbering; worked surface Y/N; functional coating on worked surface? (Y/N/Unknown); geometry checklist; photos attached.
Acceptance split: VIS governs post-restoration appearance on the exposed surface; product design prints in the laminate are outside VIS acceptance unless a worked patch exists on the face.

Mis-ID Pitfalls (Informative)

Attempting to “blend” the exposed face to “mute” a laminate print introduces a worked region with a visible transition edge, which VIS disallows at acceptance. Do not modify face geometry to change encapsulated artwork.

Reporting Language (Template)

P.04.02 Laminated Interlayer Pattern/Print (Design Feature) — Uniform printed/tinted interlayer visible through the ply; MSRT on exposed face = SC-0 (no relief). No transition edge and no chip-flank/pit morphology on the face. Logged as design/processing feature — not surface damage under VIS-DA. If a worked patch is present on the face, classify by morphology and assign CAT; if laminate-internal/inaccessible, record CAT-5 and refer per protocol.

DSS-P.04.03

Spandrel Opacity Variation (system tolerance)

DSS-P.04.03
Spandrel Opacity Variation (system tolerance)
(Specialty/Decorative Systems — reference; generally not “damage”)

Definition (Reference)

Spandrel glass uses an opaque back-paint or ceramic-frit system to mask building elements. Minor opacity/tonal variation is a system/production tolerance (paint film build, substrate/cavity effects) and is not a worked-surface defect. Evaluate using the VIS inspection lighting/geometry; post-restoration acceptance for any worked area follows VIS and must not be conflated with factory/product acceptance for spandrel systems.

Typical Presentation (Informative)

Low-contrast “mottle/cloudiness” visible through the exterior lite over pane-scale areas; increases/decreases with angle/raking.
Subtle panel-to-panel tone shift; uniform across a lite without a discrete, local boundary.
No tactile relief on the exposed surface after reveal/dry. (Use the VIS geometry—12/36/72 in; normal + oblique sweep; raking light.)

Field Identification Cues (Normative)

Surface-catch class (MSRT): SC-0 (none). One light, non-marring pass per VIS §5.5; do not abrade or repeat. On suspected coated faces, prefer a polymer stylus or rely on visual cues. MSRT supports classification only.
Visual signature: Pane-scale opacity/tonal non-uniformity without a local “worked” perimeter, transition edge, chip flanks, or pits/craters.
Viewing/lighting: Inspect at 12 / 36 / 72 in, normal incidence and oblique sweep (~60°–120°) under raking light; surfaces clean & dry (non-invasive reveal).
Location/access: Log pane ID & surface numbering (#1–#4; laminate-internal) on forms; acceptance pertains to the exposed surface being evaluated.

Classification Mapping (to VIS-DA) (Normative)

Not field damage. If observation confirms pane-scale opacity variation with SC-0 and no worked boundary, record: “Design/System Feature — Not Surface Damage (outside CAT-1…CAT-4).” Classification remains appearance-only; do not assign a CAT for factory/system tolerances.

Escalate / reclassify when localized anomalies are present:

Pinholes/holidays or adhesion-loss islands in the back-paint → Co.04.02 / Co.04.03 (coating defects on spandrel). (Worked-surface coating anomalies are not permitted at acceptance on coated faces; apply VIS §6.2.e.)
Surface rub/patchiness on an exterior coated face (non-spandrel functional coat) → Co.01/Co.03 and classify by CAT per VIS (appearance-only).
Between-pane look-alike (fixed parallax in an IGU) → CAT-5 (out of in-place scope by location); refer per project protocol.

Indicative Relief / Depth (Informative)

Opacity variation is a visual/optical system attribute; no tactile relief at the exposed surface (SC-0). Numeric depth is not applicable; classification relies on MSRT class + morphology and VIS viewing geometry.

Differentiation & False Positives (Informative)

vs. Coating anomalies (worked-surface): Coating rub/patchiness is localized, may show a worked boundary, and is disallowed at acceptance on coated faces (VIS §6.2.e). Spandrel opacity variation is pane-scale/system-level with no worked perimeter.
vs. Chemical etch or abrasion fields: Etch/abrasion present modeled micro-texture or directionality and can escalate to SC-1/SC-2; spandrel mottle remains SC-0 and perimeter-free at the exposed surface under VIS geometry.
vs. Decorative glazing texture: Patterned/textured glass has intentional surface relief (design). Evaluate per VIS geometry and decorative-glazing viewing guidance (NGA FB67-20, informative) rather than treating as opacity variation.

Evidence Package (Documentation Requirements) (Normative)

Photo set (VIS): 12 / 36 / 72 in, normal + oblique; include raking frames that show pane-scale tone/mottle, and at least one context frame establishing lack of a local worked boundary.
MSRT result: Record SC-0 (one pass only; non-marring; polymer stylus on suspected coatings).
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: VIS governs post-restoration appearance (no transition edge/directional patterning in worked areas at required views). Factory/system tolerances for spandrel are governed by product standards/project specs—do not conflate.

Mis-ID Pitfalls (Informative)

Attempting localized “spot-correction” of inherent spandrel mottle can create a worked region with a visible transition edge, which VIS disallows at acceptance (CAT-0…CAT-4). Keep classification appearance-only for system tolerances; only reclassify when true coating defects or worked-surface anomalies exist.

Reporting Language (Template)

P.04.03 Spandrel Opacity Variation (System Tolerance) — Pane-scale opacity/tonal non-uniformity observed at VIS geometry; MSRT = SC-0 (no surface relief). No transition edge or chip-flank/pit morphology on the exposed face. Recorded as design/system feature; not categorized as surface damage under VIS-DA. If localized pinholes/adhesion-loss islands or worked-surface coating rub/patchiness are present, classify under Co.04.02 / Co.04.03 or Co.01/Co.03 by CAT per VIS; if between-pane cues are confirmed, record CAT-5 and refer per project protocol.

DSS-P.04.04

Curved/Bent Glass Local Thickness / Thinning Signatures

DSS-P.04.04
Curved/Bent Glass Local Thickness / Thinning Signatures
(Specialty/Decorative systems — reference; generally not “damage”)

Definition (Reference)

Curved/bent glass local thickness/thinning signatures are pane-scale shape and thickness variations inherent to thermal bending/forming. They can present as subtle local thinning or thickening zones (e.g., at tight radii or near quench/bend tooling influence) that modulate reflections/transmission without forming a worked perimeter on the exposed face. These are manufacturing attributes observed under VIS geometry; post-restoration acceptance of worked areas remains separate from factory product acceptance.

Typical Presentation (Informative)

Angle-dependent optical effects in reflected/transmitted views near bends/radii: mild brightness roll-off, localized “soft” reflective warps, or slight magnification/minification zones tied to bend geometry—no transition edge on the face.
May co-occur with heat-treat signatures (e.g., roller/bearing influence) on bent tempered product; read strongest in raking/oblique views. Use the same VIS geometry applied to roller-wave/bow documentation.

Field Identification Cues (Normative)

Surface-catch class (MSRT)

SC-0 (none) at the exposed face. Make one light, non-marring pass per VIS §5.5 to confirm no local relief; MSRT supports classification only (do not abrade).

Visual signature

Pane-scale, non-perimeter optical shape/thickness effects contiguous with the bent geometry; no chip flanks, pits/craters, and no worked transition ring on the clear face. Use straight-line reflections (mullion/string-line/horizon) to show bending/size change across the area.

Viewing / lighting

Evaluate clean & dry at 12 / 36 / 72 in, normal incidence and oblique sweep (~60°–120°) with raking light, per VIS.

Location / access

Record pane ID and surface numbering (#1–#4; laminate-internal) on forms when IGUs/laminates are present.

Classification Mapping (to VIS-DA) (Normative)

Processing/design feature — not field damage. If observation confirms SC-0 with pane-scale optical/shape effects and no local relief, record “Processing Feature — Not Surface Damage (outside CAT-1…CAT-4).” VIS keeps classification separate from acceptance; reserve CAT-5 for between-pane/inaccessible conditions by parallax/location.

If factory flatness/optical distortion must be quantified for product acceptance, refer to product specifications (e.g., ASTM C1036/C1048) and optical distortion background (ASTM C1651, informative). VIS governs post-restoration appearance only.

Indicative Relief (Informative)

N/A as local relief. Local thickness/shape in bent glass is a product attribute; at the exposed face it does not present as a localized, MSRT-detectable relief feature. (Optical/flatness context aligns with VIS’s use of C1651 informatively for heat-treated distortion phenomena.)

Differentiation & False Positives (Informative)

vs. Roller wave (P.01.01): Roller wave is periodic flatness deviation from heat-treat; bent-glass thickness signatures are geometry-driven and track the bend radius, both SC-0 at the face. Use straight-line reflections to distinguish periodic vs geometry-tied shape.
vs. Abrasion fields (M.02): Abrasion shows directional patterning and can escalate to slight/clear catch; bent-glass thickness signatures remain SC-0 and lack a worked boundary.
vs. Coating anomalies (Co.01/Co.03): Coating rub/patchiness is localized and disallowed at acceptance on worked coated surfaces; geometry-driven thickness signatures are pane-scale, no perimeter, SC-0.

Evidence Package (Documentation Requirements) (Normative)

Photo set (VIS): 12 / 36 / 72 in; normal + oblique; include raking macros as needed; capture a straight-line reflection frame (mullion/string-line/horizon) across the bent zone to show optical/size change. Record distance/angle in-frame.
MSRT result: Record SC-0 (one light, non-marring pass; do not abrade).
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: Document per VIS; factory acceptance (flatness/optical) is governed by product standards/specs; do not conflate with post-restoration appearance rules.

Reporting Language (Template)

P.04.04 Curved/Bent Glass — Local Thickness/Thinning Signatures (Processing Feature) — Pane-scale, geometry-tied optical/shape effect observed at VIS geometry (12/36/72 in; normal + oblique; raking). MSRT = SC-0 (no relief). No transition edge or chip-flank/pit morphology on the exposed face. Recorded as manufacturing attribute — not surface damage under VIS-DA. If fixed parallax indicates a between-pane look-alike, record CAT-5 and refer per protocol. Acceptance of any worked area per VIS §6; factory product acceptance per ASTM C1036/C1048 (optical-distortion background ASTM C1651, informative).

Damage Specification Standards 2026

DSS-PProcessing/Manufacturing Features

Draft v1.0

Table of Contents

P.01

Heat‑Treated Glass Features

DSS-P.01.01

Roller Wave (Periodic Flatness Deviation)

Definition (Reference)

Typical Presentation (Informative)

Field Cues (Normative)

Classification Mapping (Normative)

Indicative Depth (Informative)

Differentiation (Informative)

Evidence Package (Normative)

Mis-ID Pitfalls (Informative)

Reporting Language (Template)

DSS-P.01.02

Bow / Warp (global shape)

Definition (Reference)

Typical Presentation

Field Identification Cues

Differentiation & False Positives

Classification Mapping (to VIS-DA CAT)

Indicative Depth / Relief

Evidence Package (Documentation Requirements)

Common Sources / Context (Informative)

Reporting Language (Template)

DSS-P.01.03

Quench / Anisotropy Patterning (polarization-visible)

Definition (Reference)

Typical Presentation (Informative)

Field Identification Cues (Normative)

Classification Mapping (to VIS-DA) (Normative)

Indicative Depth / Relief (Informative)

Differentiation & False Positives (Informative)

Evidence Package (Documentation Requirements) (Normative)

Mis-ID Pitfalls (Informative)

Reporting Language (Template)

DSS-P.01.04

Roller Pickup / “Line Ghost” (pyrolytic line pattern)

Definition (Reference)

Typical Presentation (Informative)

Field Identification Cues (Normative)

Classification Mapping (to VIS-DA) (Normative)

Indicative Depth / Relief (Informative)

Differentiation & False Positives (Informative)

Evidence Package (Documentation Requirements) (Normative)

Coating Caution (Normative)

Reporting Language (Template)

DSS-P.01.05

Edge Kink / Localized Warp

Definition (Reference)

Typical Presentation (Informative)

Field Identification Cues (Normative)

Classification Mapping (to VIS-DA) (Normative)

Indicative Depth / Relief (Informative)

Differentiation & False Positives (Informative)

Evidence Package (Documentation Requirements) (Normative)

Reporting Language (Template)

P.02

Float & Raw Glass Features

DSS-P.02.01

Tin-Side Haze / Surface “Side” Effects

Definition (Reference)

Typical Presentation (Informative)

Field Identification Cues (Normative)

Classification Mapping (to VIS-DA) (Normative)

Indicative Depth / Relief (Informative)

Differentiation & False Positives (Informative)

Evidence Package (Documentation Requirements) (Normative)

Mis-ID Pitfalls (Informative)

Reporting Language (Template)

DSS-P.02.02

Seeds / Blisters (entrapped gas)

Definition (Reference)

Typical Presentation (Informative)

Field Identification Cues (Normative)

Classification Mapping (to VIS-DA) (Normative)

Indicative Depth / Relief (Informative)

DSS-P
Processing/Manufacturing Features