Company News, Patents

Oxidative Hair Dye Patented by Henkel

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By: TOM BRANNA

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Patent No. US 6,719,811 B1: Henkel, Düsseldorf, Germany, earned a patent for a process to oxidatively dye the hair by contacting keratin fibers with a dye comprised of a carrier and indolines, or salts of indolines....

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