Release scuffing appears as directional scratches, gloss loss, or burnished streaks where the part slides against the tool. The mark often follows the demolding direction and is strongest on positive walls.
Low draft, roughness, contamination, tool damage, shrinkage, and part misalignment increase sliding force. Releasing too hot allows the surface to smear; releasing too cold can tighten the part on the tool.
Correction
The mold should be inspected in the exact contact region. Polishing may help a smooth-finish part, while a controlled texture may be required for another application. Draft and tool alignment should be checked before release agent is added.
Cooling should be adjusted to a stable release condition rather than maximized. A longer cycle can worsen scuffing if additional shrinkage increases grip. The best release point balances stiffness with manageable contact pressure.