The ASTM D5588-97 (2021) standard test method is used to detect microbial contamination during the manufacturing of paints and coatings. This method helps manufacturers identify sources of microbial contamination in raw materials, production equipment or the production environment, so that effective measures can be taken to prevent the spoilage of paints. The standard recommends that even if microorganisms cannot be completely eliminated, their levels should be controlled and combined with appropriate disinfection measures to manage contamination. This test method is suitable for those with basic microbiological technical knowledge, but it is technically demanding and requires careful operation.