Found 2 items, similar to Chrome alum.
English → English (WordNet) Definition: chrome alum chrome alum n : a violet-colored salt used in hide tanning and as a mordant in dyeing
English → English (gcide) Definition: Chrome alum Chrome \Chrome\, n. Same as Chromium. [1913 Webster] 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. [1913 Webster]