The coating is generally composed of film forming materials, fillers (pigments and fillers), solvents and additives. Sometimes the composition will change slightly according to the performance requirements, for example, there is no pigment or filler in the varnish, and there may be no solvent in the powder coating.

Nitrocellulose varnish is a kind of transparent paint made of nitrocellulose, alkyd resin, plasticizer and organic solvent. It belongs to volatile paint and has the characteristics of fast drying, soft luster, etc. Nitrocellulose varnish is divided into bright, semi matte and matte, which can be selected according to needs. Nitrocellulose paint also has its disadvantages: it is easy to turn white in high humidity, low fullness and low hardness.