Patents

Improved Durability of Hair Color

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By: TOM BRANNA

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US Patent No. 10,363,208 B2 (Andrea Elsen, Nghi Van Nguyen, Jim Singer, Daniella Gonzalez-Toro, Martin Asare); L’Oréal, Paris, has patented a method for artificially coloring hair and inhibiting the coloring from fading. The method entails treating the hair with a pre-color treatment composition that has one or more divalent metal salts of an inorganic acid and one or more monovalent or divalent metal salts of an organic acid; and treating the hair with a hair coloring composition comprising one...

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