Paint or coating: Paint is a chemical coating that can cover the surface of objects for protection, decoration, signs and other special purposes. The more authoritative "Paint Technology" book of the Chinese coatings industry defines it as follows: "Paint is a material that can be placed on the surface of an object using different construction techniques to form a solid, continuous, solid film with a certain strength. The film thus formed is commonly referred to as a coating film, or a paint film or coating. "
The coating is generally composed of four parts: film-forming substance, filler (pigment filler), solvent and auxiliary agent. According to the performance requirements, the length composition will be slightly changed. For example, the varnish has no pigment and filler, and the powder coating may be free of solvent.
According to the classification of modern chemical products, coatings belong to fine chemical products. Modern coatings are gradually becoming a class of multifunctional engineering materials and an important industry in the chemical industry.