DSS-A.01.01 — Internal Haze / Volatile Fogging (#2 / #3)

Internal haze/volatile fogging is a diffuse film or whitish veil deposited on IGU cavity faces (usually #2 / #3), arising from outgassing or volatile transport within the sealed unit. Because the cue resides between panes, it is not accessible to in-place restoration; classification is driven by location/condition rather than surface catch. Identify cavity faces by surface numbering and verify between-pane status via fixed parallax.

• Pane-scale, low-contrast veil or “cloud” that persists after reveal/dry and does not respond to wiping on #1/#4.
• Stronger in oblique/raking views; no local worked perimeter on exposed faces.
• May co-occur with other A.01 conditions (e.g., desiccant fines or spacer bleed) in the cavity. Inspect under VIS geometry.

Location / access (primary):

• Confirm the cue is between panes using parallax: the feature’s position is fixed relative to its reflection when the observer moves. Record #2 / #3 if applicable. If between panes, treat as CAT-5 by location.

Surface-catch class (MSRT):

• Not determinative for between-pane conditions; classification is location/condition-driven. If attempted on the exposed face, record SC = n/a for the internal cue; do not abrade.

Visual signature (exposed faces):

• No transition edge or local worked ring on #1/#4 after Non-Invasive Reveal; haze remains unchanged by exterior cleaning. Evaluate at 12 / 36 / 72 in with normal + oblique sweep under raking light.

• CAT-5 - Out of scope for in-place restoration when confirmed between panes (IGU cavity) or otherwise inaccessible. Document and refer per project protocol (e.g., manufacturer/service).
• If the haze proves to be on the exposed face (responds to reveal and shows worked-surface morphology), reclassify under R (film/residue) or Ch (chemical) families and assign CAT per VIS (§4.2).

• Internal haze is optical/film deposition within the cavity; there is no face-side tactile relief accessible to MSRT on #1/#4. Depth is not applicable; location governs classification.

• vs. Exterior/interior films (R.04 / R.02): True residues on #1/#4 change with Non-Invasive Reveal; internal haze does not.
• vs. Low-E coating rub (Co.01/Co.03): Coating rubs are worked-surface anomalies on an exposed coated face and are disallowed at acceptance when present on the worked surface (VIS §6.2.e). Internal haze shows fixed parallax and no worked perimeter.
• vs. Condensation: Temporary moisture on #1/#4 violates VIS environment controls (no wet/condensing surfaces) and clears with dry/conditioning; internal haze persists.

• Photo set (VIS): 12 / 36 / 72 in, normal + oblique; include raking frames. Capture a short sequence or paired frames to demonstrate fixed parallax (feature position remains fixed relative to reflection). Note lighting/time and reveal status.
• Forms: Pane ID; surface numbering (#1-#4; laminate-internal if applicable); worked surface Y/N; functional coating present on worked surface? (Y/N/Unknown); environment checks (dry, no condensation).
• Acceptance split: CAT-5 conditions are not subject to in-place acceptance under VIS; document and refer. Do not conflate factory/system conditions with VIS acceptance for restored faces.

Attempting spot-work on #1/#4 to “chase” a between-pane haze creates a worked region with a visible transition edge, which VIS disallows at acceptance (CAT-0...CAT-4). Confirm parallax before any action.

• A.01.01 Internal Haze/Volatile Fogging (#2/#3) - Pane-scale between-pane veil verified by fixed parallax; no change after Non-Invasive Reveal of #1/#4; MSRT not applicable to internal cue. Logged as CAT-5 (out of in-place scope by location). Document per VIS (photos at 12/36/72 in; normal + oblique + raking; surface numbering recorded) and refer per project protocol.