GB/T 37362.1-2019 "Paints and varnishes - Drying tests - Part 1: Determination of through-dry state and through-dry time" applies to paints and varnish products, specifying the method for determining the through-dry state and the procedure for measuring drying time. Under standard temperature and humidity conditions, specific test methods are used to assess whether the paint film has reached a through-dry state, characterized by being non-tacky, free of indentations, and capable of withstanding specific friction. The time from application to achieving this state is recorded. The standard adopts relevant international technical standards, providing a basis for the unified evaluation and quality control of the drying performance of coatings. It clarifies the test conditions, operational steps, and requirements for result determination.