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Topic starter
20/06/2022 4:43 pm
Checking is
- A . an exposed area of the substrate or previous coat material, caused by poor application technique.
- B . a fine crack in the surface of a coating that rarely reaches the substrate
- C . a very small hole in a coating caused when air or solvent is trapped in porous film and then escapes.
- D . surface breaks in the film that often result from grease or oil contamination and revel the substrate.
Suggested Answer: B