The standard "ISO Coating and varnish - Volume 1:2 General Test Methods" systematically introduces the general methods of Coating and varnish performance testing, including the determination techniques of core indicators such as Coating thickness, adhesion, Hardness, Glossiness and weathering resistance. The standard specifies the test steps, equipment requirements and result evaluation methods in detail to ensure the accuracy and repeatability of test data. As a general technical reference in the industry, the standard is applicable to the research and development, quality control and performance evaluation of Coating and varnish, providing an important basis for improving product mass and promoting internationalization. This standard is a key tool for technicians and testing organizations in the field of coatings, helping to harmonize testing processes and promote international technical exchange and trade cooperation.