This standard specifies the requirements, sampling, test methods, inspection rules and marking, packaging, transportation and storage of CI Pigment Red 53:1. This standard applies to azo lake pigments produced by the coupling of 2-amino-5-chloro-4-toluenesulfonic acid diazonium salt and 2-hydroxynaphthalene, and subjected to barium salt lake formation and special pigmentation treatment. Dry product. Products are mainly used in inks, plastics and coatings. This standard sets color, relative tinting power, 105°C volatiles, water-soluble matter, sieve residue, pH value of aqueous suspension, conductivity of water extract, oil absorption, acid resistance, alkali resistance, solvent resistance, heat resistance 15 items including properties, light resistance, dispersion and product safety.