PROBLEM TO BE SOLVED: To provide a non-oxidative one-pack hair dyeing agent containing Orange No.205 in at least a certain ratio that exhibits good hair-dyeing properties and hardly causes skin coloration.SOLUTION: The non-oxidative one-pack hair dyeing agent comprises components (A)-(E) and has a pH of 2-5: (A) 0.3-3 mass% of an acid dye component containing at least 70 mass%, based on the whole acid dye, of Orange No.205 and optionally containing Black No. 401 within an amount range such that the mass ratio thereof to Orange No.205 (Black No.401/Orange No.205) is less than 0.25 (B) 1-12 mass% of benzyl alcohol (C) 2-9 mass% of polyethylene glycol having a number-average molecular weight of 200-10,000 (D) 5-15 mass% of a 4C or lower monohydric alcohol and (E) an organic carboxylic acid or a salt thereof.COPYRIGHT: (C)2011,JPO&INPIT【課題】橙色205号を一定割合以上含み、染毛性が良くかつ皮膚着色の少ない非酸化型一剤式染毛剤の提供。【解決手段】成分(A)~(E)を含有し、pHが2~5である非酸化型一剤式染毛剤。(A)全酸性染料中70質量%以上の橙色205号を含み、黒色401号を橙色205号との質量比(黒色401号/橙色205号)が0.25未満となる範囲内で含んでもよい酸性染料成分 0.3~3質量%(B)ベンジルアルコール 1~12質量%(C)数平均分子量200~10000のポリエチレングリコール 2~9質量%(D)炭素数4以下の1価アルコール 5~15質量%(E)有機カルボン酸又はその塩【選択図】なし
