BS 282, 389:1963

Description, composition, residue on sieve, matter volatile at 100°C, oil absorption value, colour, staining power, colour on reduction. Zinc chromes: requirements and test method for freedom from impurities are included: Types 2 and 3, limits for sulphates, chlorides, nitrates; Type 2, limit for water-soluble chromates; Type 3, limit for total water-soluble matter.