Adhesion of a lacquer film to the corresponding substrate. It is tested by means of the cross-cut test. The dried lacquer film is cut into squares of 2mm along the edges using a template and knife.

The quality of the adhesion is evaluated according to how much lacquer flakes off or the appearance of the cut edge. On hard substrates an adhesive tape is applied to the grid and removed at an even speed. This allows the lacquer film to stick to the adhesive tape.