Chrome alum (Chem.), a dark violet substance, (SO4)3Cr2.K2SO4.24H2O, analogous to, and crystallizing like, common alum. It is regarded as a double sulphate of chromium and potassium.
Chrome green
(a)
The green oxide of chromium, Cr2O3, used in enamel painting, and glass staining.
(b)
A pigment made by mixing chrome yellow with Prussian blue.
Chrome red, a beautiful red pigment originally prepared from the basic chromate of lead, but now made from red oxide of lead.
Chrome yellow, a brilliant yellow pigment, PbCrO4, used by painters.
