What does "solvent pop" refer to in automotive refinishing?

"Solvent pop" specifically refers to bubbles that form in the paint film as a result of solvent evaporation when the paint is drying too quickly. This phenomenon occurs when the solvent trapped beneath the surface of the paint evaporates rapidly, creating pressure that forces the paint layer to bulge. When the pressure is released, it causes small bubbles or pinholes to form in the surface, which can lead to a defective finish and require additional refinishing work.

In the context of automotive refinishing, understanding the causes of solvent pop is crucial. It often occurs in conditions where the atmosphere is too hot or dry, or when an inadequate drying time is taken between layers of paint. Addressing the drying conditions can mitigate the risk of solvent pop, as well as ensuring the proper application techniques are followed.