Blonding Hair Dye
Published November 14, 2005
l Patent No. US 6,620,408 B2: German researchers for Henkel KGa, Düssel-dorf, Germany, patented a method to make hair blond by admixing a composition comprising at least one solid peroxo compound, at least one solid alkalizing agent and at least one dicarboxylic acid in the formula and applying to the hair.
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