Patents

L’Oréal Patents Dyeing Process

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By: Christine Esposito

Editor-in-Chief

US Patent No. 10,485,744 B2 (Arno Wahler); L’Oréal has patented a process for treatment of keratinous substances that entails applying a composition that comprises at least one nonionic alkylpolyglucoside surfactant, at least one metal salt and at least one thickening polymer; optionally wiping mechanically, drying, or rinsing the keratinous substances; and applying a second composition that is comprised of at least one ortho-diphenol derivative....

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