10.02.14
US Patent No. 8,795,391 B2l; Kao Germany has patented an aqueous composition for coloring human hair, comprising at least one oxidative dye precursor; optionally at least one coupling agent and/or at least one direct dye in a cosmetically acceptable medium; at least one anionic surfactant selected from sulphate, sulphonate, carboxylate and aminocarboxylate surfactants; at least one branched fatty acid; and at least one quaternary ammonium surfactant.