Happi Staff02.03.20
US Patent No. 10,485,744 B2 (Arno Wahler); L’Oréal, Paris, has been awarded a US patent for a process for treatment of keratinous substances. It entails applying a first composition that is comprised of at least one nonionic alkylpolyglucoside surfactant, at least one metal salt, at least one thickening polymer; optionally wiping mechanically, drying, or rinsing the keratinous substances; and then applying a second composition that contains at least one ortho-diphenol derivative.