paint, what we usually call paint, is just one of them. It refers to a class of liquid or solid materials coated on the surface of an object that can form a film under certain conditions for protection, decoration or other special functions (insulation, rust prevention, mildew prevention, heat resistance, etc.). Because most of the early coatings used vegetable oil as the main raw material, it is also called paint. Now synthetic resin has replaced vegetable oil, so it is called paint. Coating is not liquid, powder coating is a large category of coating varieties. The coating belongs to the organic chemical polymer material, and the formed coating belongs to the type of polymer compound. According to the classification of modern chemical products, coatings belong to fine chemical products. Modern coatings are gradually becoming a class of multi-functional engineering materials, is an important industry in the chemical industry. There are four main functions: protection, decoration, cover up product defects and other special functions to enhance the value of the product. In the past 60 years since the founding of New China, along with the development of various industries in the national economy, the coating industry as its supporting industry has gradually developed from a small industry that is not noticeable to all fields of the national economy.
