Company News, Patents

Henkel Receives Patent For Hair Colorants

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By: TOM BRANNA

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Patent No. US 6,814,761 B1: Dusseldorf, Germany-based Henkel KgA developed a composition for coloring or tinting keratin fibers comprising at least one 2-nitro-p-phenylenediamine derivative corresponding to a specific formula, as a substantive dye....

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