In what direction does infrared light cure paint films?

Infrared light cures paint films by penetrating into the coating and providing heat from within, effectively curing the layers of paint from the inside out. This method results in a highly efficient curing process as it allows the energy to be absorbed deeper into the paint film, promoting faster drying and better adhesion.

The inside-out curing method is particularly advantageous for thicker layers of paint, where traditional curing methods might only affect the surface. This ensures that the paint cures uniformly, avoiding potential issues such as blistering and incomplete curing that can occur when the curing process begins solely at the surface.

Other approaches, such as curing from the outside in or from the top down, may not penetrate adequately or evenly through thicker layers, leading to inconsistent results. Therefore, the inside-out approach is the most effective for achieving optimal curing in paint films.