DB 32/T 3500-2019 "Volatile organic matter limit in coatings" stipulates the content limit of vocs (VOC) in coatings and its detection method. Volatile organic matter is a harmful gas that may be released during the use of coatings, which has certain hazards to the environment and human health. The standard aims to reduce the emission of VOC in coatings and promote the development of the coating industry towards environmental protection and low pollution. The standard details the VOC limit requirements for different types of coatings, and provides corresponding test methods and quality control requirements. Through the implementation of this standard, it aims to promote the green development of coating products, reduce the emission of volatile organic matter, and enhance the environment-friendly and sustainable development ability of the coating industry.