The ISO TR 19402 standard provides a technical report on Paints and varnish Coating adhesion, which is designed to guide the Coating industry in the evaluation of coating adhesion. The report details the various factors that affect Coating adhesion, including substrate type, Coating thickness, environmental conditions, etc., and provides a variety of test methods and evaluation criteria to ensure that Coatings can adhere firmly to the surface of the substrate in practical applications. The methods in the standard are not only suitable for common substrates such as metals and wood, but also cover coating adhesion testing for special materials. By adhering to ISO TR 19402, users can accurately assess the adhesion performance of coatings, thus improving product durability and Reliability.