| abstract |
(57) [Summary] [Purpose] To develop an acidic hair treatment agent that has a good feel after finishing and is excellent in hair dyeing power, penetrability and fastness. [Structure] 0.01 to 0.03% by weight of an acid dye, a specific amount or more of aromatic alcohol, and trimethylglycine An acidic hair treatment composition containing 30% by weight and having a pH of 1.5 to 5.0. [Effect] Good hair dyeability, dye penetrability and fastness are provided while imparting excellent conditioning effect to hair. |