Film cracks occur due to improper storage, fluctuating humidity, and brittle base materials. Over time, the emulsion layer separates or fractures, leaving sharp, high-contrast lines across the image sequence.
Physical breaking of the photo-sensitive layer. Diamant-film Restoration Crack
| Condition | Action | | :--- | :--- | | Crack wider than 0.1 mm | – no fill will match DLC hardness. Recommend professional recoating. | | Flaking at edge | Stabilize only – apply cyanoacrylate along the flake edge, then polish. | | Substrate corrosion visible | Remove coating – crack has breached the barrier. Chemical strip (K₃Fe(CN)₆ + KOH, 50°C). | | Cosmetic only, non-structural | Leave as-is – any restoration may worsen visibility. Apply museum wax seal. | Film cracks occur due to improper storage, fluctuating