Oxidative dye precursors for human hair contain 1,4-diaminobenzene or a substituted p-phenylenediamine or their salts, together with dihydroxyacetone, alloxane, methyl glyoxal and/or potassium iodide

摘要

A dye for human hair containing, as oxidation precursor, 1,4-diaminobenzene or a substituted p-phenylenediamine or their salts in an aqueous base, also contains 0.0001-5 wt.% dihydroxyacetone, alloxane, methyl glyoxal and/or (potassium, in disclosure but not claims) iodide.