The ASTM D4752 standard describes the solvent wiping method for determining the tolerance of vinyl silicate (inorganic) zinc-rich primer to methyl ethyl ketone (MEK). This test method evaluates the degree of curing and solvent resistance of the paint film by rubbing the surface of the paint film with a cheesecloth soaked in MEK. The standard specifies the conditions under which friction is applied, including the type of cotton cloth, stroke distance, stroke rate, and applied pressure. This method is widely used in the Coatings industry to quickly and relatively evaluate the curing of coatings, providing an important basis for product quality control, especially when the tolerance of the paint film needs to be quickly judged.