| abstract |
【Task】 An object of the present invention is to provide a hair color treatment method that has a better color in performing hair dye, is free of paraphenylenediamine, and can reduce skin damage. [Solution] The hair color treatment method of the present invention is a step of applying a hair cosmetic containing an alkaline agent, a first amino acid, a higher alcohol having 12 to 22 carbon atoms, a surfactant, and a thickener. A hair coloring agent comprising: a basic dye; an HC dye; a second amino acid; a first cationic surfactant; a thickener; an oil; a first pH adjuster; and a wetting agent. The hair colorant has a pH of 6.8 or more. The step of applying the hair colorant is characterized in that it comprises: [Selection figure] None |