This document discusses common paint defects including cratering, dust, orange peel, sagging, and poor opacity. Cratering and dust refer to popping and an uneven surface like orange peel. Sagging is when the paint film becomes too thick in parts and sags. Poor opacity is when the undercoat color shows through due to poor pigmentation or insufficient paint thickness.

1. DEFECTS OF PAINT

2. (1) CRATERING
(2) DUST (NIBS)
(3) ORANGE PEEL
(4) SAGGING
(5) POOR OPACITY

5. Popping appears on the film surface.
Popping

8. Paint surface become uneven like orange peel.

11. Substrate
Paint film
Paint film partly becomes too thick and the paint sags.

14. The color of undercoat is not hidden caused by poor pigmentation, or insufficient film thickness
Poor pigmentation
Insufficient film thickness