This standard specifies the requirements, test methods, inspection rules and marking, packaging, storage, etc. of various colors of nitrocellulose primers. This standard applies to various colors of nitrocellulose primers prepared from nitrocellulose, alkyd resin, rosin glyceride, pigments, extender pigments, plasticizers and organic solvents. The paint dries quickly and is easy to polish. It is mainly used for coating castings, vehicle surfaces and matching primers for various nitrocellulose paints.