DSS-P.03.04 — Drill/Slot “Exit Lip” (acceptable edge artifact)

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.

• 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.

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.

• 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.

• 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.

• 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.)

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.

• 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.