发明授权
US5421833A Hair dye compositions based on oxidation dyestuff precursors 失效
基于氧化染料前体的染发组合物

Hair dye compositions based on oxidation dyestuff precursors
摘要:
Hair dye compositions without sensitizing potential but with improved dyeing properties for all shades comprise only 2-(2'-hydroxyethylamino)5-aminotoluene or the salts thereof as developing agent, or preferably in combination with the usual coupling agents, excluding 1-methoxy-2,4-diaminobenzene and 1-ethoxy-2,4-diaminobenzene.
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