"HG/T 3001-1999 Iron blue pigment" specifies the requirements, sampling, test methods, inspection rules and labels, Encasement, transportation and storage of iron blue pigment. This standard applies to iron blue pigment made by oxidation treatment of potassium ferrocyanide (sodium) and ferrous salt after reaction. Except for the appropriate amount of additives added to improve pigment performance, it does not contain Miscellaneous pigment, filler, etc. The product is mainly used for Coating, inks, painting pigment, copy paper, etc.