DSS-M.02.01 — Micro-Abrasion Swirls / Pad Trails (non-linear)

A non-linear, repetitive swirl or looping trail produced by contact pads, cloths, or small tools traversing the glass face, leaving a fine, directional micro-abrasion field. Under raking light, the field reads as swirls/arcs and may present “modeled micro-texture” (subtle milky relief) when depth increases. Use VIS terminology for directional patterning, modeled micro-texture, micro-chipping/chip flank, MSRT (surface-catch), and VIS viewing/lighting for appearance-based classification.

• Clusters of faint arcs/crescents or tight circular loops concentrated in hand-size patches; sometimes overlapping into a broader haze field.
• Strongest in raking light and oblique sweep; persists after Non-Invasive Reveal (clean & dry).

Surface-catch class (MSRT):

• Often SC-0 to SC-1 for very fine swirl (non-tactile to slight); SC-2 when the field contains tactile lines with micro-chipping/chip flanks. Perform one light, non-marring pass only; MSRT supports classification, not acceptance. Prefer a polymer stylus if a functional coating may be present.

Reveal / lighting / geometry:

• Complete Non-Invasive Reveal (distilled/neutral-pH water; lint-free microfiber; no blades/abrasives/chemicals before evaluation). Inspect at 12 / 36 / 72 in, normal incidence + oblique sweep (~60°-120°) with raking light, per VIS. Record distances/angles in-frame.

Location / access:

• Confirm the cue is on the exposed face (not between panes). Use parallax to rule out internal look-alikes (between-pane cues show fixed parallax); record surface numbering #1-#4 / laminate-internal on Forms:

Assign CAT by visibility convention and MSRT outcome, applying the VIS three-part cueing (surface catch + morphology + location/access):

• CAT-1 - Faint: SC-0 / SC-1; non-tactile swirls, no chip flanks, and no localized edge; read mainly in raking light; do not localize at acceptance geometry.
• CAT-2 - Light: SC-1; clean-edged fine lines or light micro-texture; limited visibility at standard view.
• CAT-3 - Moderate: SC-2 (clear) elements within the swirl field or modeled micro-texture noticeable at standard distance.
• CAT-4 - Severe: SC-2 (clear-to-strong) with rough chip-flank segments, pits/craters, or a broad matte/frosted field visible at standard and wide-field views.

(Classification is appearance-based; acceptance is handled separately in VIS §6.)

• CAT-1: ~0-0.2 μm (non-tactile field; tone/shine change only).
• CAT-2: ~0.2-1 μm (fine lineation; minimal edge breakout).
• CAT-3: ~1-5 μm with incipient micro-chipping in some loops.
• CAT-4: ≥5 μm with rough chip-flank segments and local pits/craters.

(Depths are illustrative for cueing only; VIS classification/acceptance remains appearance-based.)

• vs. Residue films/overspray (R-family): Residues change with Non-Invasive Reveal; true micro-abrasion persists. vs. Burnish/haze field (M.02.04): Burnish reads as a broader, non-directional sheen shift; pad swirls show distinct directional loops.
• vs. Squeegee burn lines (M.02.05): Squeegee burns are typically linear along pull paths; swirls are looped/curvilinear.
• vs. Coating anomalies (Co-family): Coating rub/patch/colour shift is area-based, often SC-0/SC-1, and lacks chip flanks; coating anomalies on the worked face are not permitted at acceptance.
• vs. Between-pane cues (A-family): Internal features show fixed parallax → CAT-5 by location.

• Photo set (VIS): 12 / 36 / 72 in, normal + oblique, include raking; add macro frames showing the swirl geometry and edge morphology (confirm absence/presence of chip flanks) and no worked transition edge. Record reveal status, lighting, time; annotate distance/angle in-frame.
• MSRT result: Record SC class (SC-0 / SC-1 / SC-2 as observed); one pass, non-marring; on suspected coated faces, prefer polymer stylus or rely on visual cues.
• Forms: Pane ID; surface numbering (#1-#4 / laminate-internal); worked surface Y/N; functional-coating on worked surface? (Y/N/Unknown); viewing-geometry checklist; photos attached-per VIS Appendix X3.

• Do not “test-polish” to make swirls more visible-this creates a worked region/transition edge that VIS disallows at acceptance for CAT-0...CAT-4. Keep evaluation non-marring and appearance-only.

• M.02.01 Micro-Abrasion Swirls / Pad Trails - Curvilinear swirl field at #__ confirmed after Non-Invasive Reveal; MSRT = SC-0/SC-1/SC-2; chip-flanks absent/present (record). Classified CAT-1/2/3/4 by visibility and flank severity per VIS. Photo set at 12/36/72 in (normal + oblique + raking); surface numbering and form fields recorded. Acceptance per VIS §6 (appearance-based).