What does the term "flash" refer to in the painting process?

The term "flash" in the painting process specifically refers to the time required for the solvents in the basecoat to evaporate after application. During this phase, the surface of the paint starts to become dry to the touch but is not fully cured. This evaporation is crucial as it allows for proper adhesion of subsequent layers of paint, such as clearcoats. If the flash time is inadequate, it can lead to issues like poor adhesion, bubbling, or other defects in the finish.

Understanding this concept is essential for achieving a high-quality paint job, as proper flash time ensures that each layer interacts correctly with neighboring layers, resulting in a smoother and more durable finish. While paint drying time, application processes, and final curing times are all important in the overall painting procedure, "flash" specifically highlights the critical moment when basecoat solvents evaporate before any additional coatings are applied.