Patents

Kao Patents Oxidative Dying Composition

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By: TOM BRANNA

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US Patent No. 9,770,397 B2; Kao Germany, Darmstadt, has been awarded a US patent for an oxidative dyeing composition that contains at least one dyestuff selected from oxidative dyestuff precursors and direct dyes, and one or both of avenanthramide and a derivative thereof.   ...

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