GB/T 13893-2008 "Determination of moisture resistance of Paints and varnishes, continuous condensation method" is based on the ISO 6270-1:1998 standard, developed by the China Petroleum and Chemical Industry Association. The standard specifies a method for evaluating the moisture resistance of coatings and Coating systems in a high-humidity environment with continuous condensation. Applicable to a variety of coating substrates, including porous and non-porous substrates. By simulating Humidity changes, the method is able to evaluate the persistence and durability of coatings in humid environments, providing Coating manufacturers and users with a basis for measuring and selecting Coating performance.