DSS-A.02.03 — Contamination Inclusions (foreign matter within laminated interlayer)

Discrete foreign particles/fibers/particulates encapsulated within the laminated interlayer between glass plies (e.g., dust, fabric lint, granules, hairline fibers). These are laminate-internal features-not on an exposed worked face-and are therefore not addressable in place; classification is location/condition-driven. Product/spec context for laminated glass: ASTM C1172 and ISO 12543 (normative in VIS). Use VIS surface numbering; identify as laminate-internal (distinct from #1/#4 and IGU #2/#3 faces).

• Point-like specks (dark/opaque), light-colored lint, or fine filaments captured in the interlayer; may align with lay-up direction or appear clustered near edges/inserts.
• No change after Non-Invasive Reveal of exposed faces and no worked transition edge on the face. Evaluate using VIS lighting/geometry.

Location / access (primary):

• Confirm laminate-internal location. On forms, record product family (laminated) and surface numbering (#1-#4; laminate-internal). Do not re-number laminate-internal faces as IGU faces.

Surface-catch class (MSRT):

• SC-0 (none) on exposed face(s). MSRT is single, non-marring and used only to support classification-not acceptance. Do not abrade.

Inspection environment / reveal controls:

• Perform Non-Invasive Reveal (clean & dry) before evaluation; persistence confirms non-face location. Avoid blades/abrasives/chemicals prior to classification.

Viewing / lighting:

• VIS geometry: 12 / 36 / 72 in; normal incidence + oblique sweep (~60°-120°) under raking light. Back-lit frames can help show particle silhouette.

• CAT-5 - Out of in-place scope when inclusions are laminate-internal (not on an exposed worked surface). Document and refer per project protocol (fabricator/manufacturer/warranty).

• Not applicable to the exposed face (no measurable surface relief; SC-0). VIS μm ranges apply to face-side defects only.

• vs. Face-side residues/overspray (R-family): Face films respond to Non-Invasive Reveal; true inclusions do not.
• vs. Stones/knots in float (P.02.03): Factory solid inclusions in the glass mass (processing feature); encapsulated and SC-0 on the face. Classify per processing features, not laminated interlayer contamination.
• vs. Bubbles/stringers (A.02.02): Gas voids without foreign matter; contamination inclusions show solid particulate/fiber boundaries. Keep the family assignment distinct; both are laminate-internal and typically CAT-5.

• Photo set (VIS): 12 / 36 / 72 in, normal + oblique, raking; include a back-lit close-up (when safe) to show inclusion boundary; ensure reveal completed is noted.
• 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.
• Optional measurements: Approximate particle size (mm), count per area, distance from edge; note temperature/RH at time of inspection. (Use VIS form notes.)

Attempting “spot-work” on the face to address an internal inclusion risks creating a worked region (visible transition edge) that VIS disallows at acceptance for CAT-0...CAT-4. Keep classification appearance-only and location-based; refer.

• A.02.03 Contamination Inclusions (laminate-internal) - Discrete foreign particulate/fiber within interlayer; no change after Non-Invasive Reveal; MSRT = SC-0 on exposed faces; documented at 12/36/72 in with normal + oblique under raking. CAT-5 (laminate-internal; out of in-place scope). Refer per project protocol.