DSS-M.04.01 — Impact Divot (non-through)

A non-through impact divot is a localized indentation/pit on the exposed surface caused by a blunt contact or small projectile that does not result in a through-thickness crack or star-break. Classification here is appearance-only per VIS (method-agnostic). Inspect under VIS lighting/geometry, after Non-Invasive Reveal, and record surface numbering and worked-surface status on Forms

• Single dimple/pit with a bright crater rim in raking light; may show a micro-halo.
• No radial “star” arms; no through-thickness crack network.
• Can have fine chip flanks at the rim when severity increases; isolated rather than lane-like. (Use VIS oblique sweep + raking to develop edge contrast.)

Surface-catch class (MSRT)

• Expect SC-1 (slight) for shallow dimples; SC-2 (clear) where a defined crater rim/chip flanks are present. Perform one light, non-marring pass only to sense relief; on suspected coated faces, prefer a polymer stylus or rely on visual/location cues. MSRT supports classification, not acceptance.

Visual signature

• Localized pit/crater with bright rim and no continuous lineation; if chip flanks or peppered satellites appear, escalate severity by morphology (see CAT mapping).

Viewing / lighting

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

Location / access

• Record pane ID and surface numbering (#1-#4; laminate-internal) on Forms: If fixed parallax proves a between-pane look-alike (e.g., cavity debris mark), classify CAT-5 (out of in-place scope) and refer.

Assign category by appearance + MSRT + morphology (three-part cueing under VIS). Depth figures below are indicative to anchor the spectrum:

• CAT-2 (Light): Shallow dimple with SC-1; clean crater edge, no chip flanks; mainly a raking-only cue at close/standard view. Indicative depth: ~10-40 μm.
• CAT-3 (Moderate): Pronounced pit with SC-2 (clear); minor chip flanks and/or modeled micro-texture around the rim; noticeable at standard view. Indicative depth: ~40-120 μm.
• CAT-4 (Severe): Deep crater with rough, bright flanks, peppered micro-pits, or adjacent crater field; clearly visible at standard & wide-field views. Indicative depth: ~120-300 μm+.
• CAT-5 (by location/condition): If integrity indicators are present (active cracks, star-break, moving pane) or the cue is between panes/inaccessible, record CAT-5 and refer.

CAT assignment is appearance-based under VIS; acceptance is separate (VIS §6).

• vs. Hot-particle peppering (Th.01.01/Th.01.02): Thermal peppering forms clusters/fields of fused nodules/pits with very bright flanks; distribution is often speckled rather than a single dimple. Classify under Th.01 when fielded.
• vs. Pellet/BB impact signature (M.04.03): Pellet/BB strikes tend to present larger divots with micro-radial cracking or subsurface cone; if star-like arms or through-cracking appear, escalate out of this entry and consider CAT-5 by integrity.
• vs. Open inclusion (“open stone,” P.02.03): An open stone can mimic a crater but relates to a processing inclusion; use MSRT + reveal and look for irregular inclusion boundary vs. clean impact geometry; classify per P.02.03 if confirmed.
• vs. Linear scoring (M.01): Scoring forms extended lines/tracks with clear catch; an impact divot is localized.

• Photo set (VIS): 12 / 36 / 72 in, normal + oblique; include raking macros of the crater rim and at least one context frame establishing isolation (i.e., not a field of peppering). Record distance/angle in-frame.
• MSRT result: Record SC-class (SC-0/1/2) with one light, non-marring pass; polymer stylus preferred on suspected coated faces.
• Forms: Pane ID; product family & surface numbering (#1-#4; laminate-internal); worked surface Y/N; functional coating present on worked surface? (Y/N/Unknown); reveal status; lighting/time; geometry checklist; photos attached.
• Acceptance split: VIS §6 governs post-restoration appearance; classification ≠ acceptance. Transition edges and coating anomalies remain disqualifying per the applicable acceptance category.

• M.04.01 Impact Divot (non-through) - Localized crater on surface #___ with SC-[1/2] at rim; no radial star or through-crack observed. Visible at [12/36/72 in] under VIS geometry after Non-Invasive Reveal. Classification: CAT-[2/3/4] by morphology + MSRT. Location/access: surface numbering recorded; no between-pane parallax. Acceptance: per VIS §6; documentation attached (photo set + forms).