Standard GB/T 4893.4-1985 "Cross-cutting determination of adhesion of furniture surface paint film" is suitable for evaluating the adhesion fastness of furniture wood surface paint film to the substrate and the bonding fastness between the bottom paint layers. Use a sharp blade to cut cross lattice cuts on the surface of the paint film, and grade according to the degree of flaking of the paint film within the cuts. Tests are carried out under specified temperature Humidity conditions, using specific adhesion measuring instruments and auxiliary materials such as zinc oxidation plaster and bristle paint brushes to ensure accurate evaluation of the performance and quality of the paint film.