PROBLEM TO BE SOLVED: To provide a hairdye composition by which the color fading at shampooing after hair dyeing is reduced and the color fastness is improved, by which the hair can be dyed to a color naturally beautifully seen without assuming greenish color under the light of a fluorescent lamp or an incandescent electric lamp having bad color rendering, and which can reduce the change of hue after color fading.SOLUTION: The hairdye composition at least containing an acidic dye and an acid contains each of (A) Red No. 504, (B) Orange No. 205, (C) Black No. 401 and (D) Purple No. 401 as the acidic dye, and is regulated so that the content of (A) may be 0.001-1.0% (% represents mass% and the following % is the same), the formulated ratio [(A):(B)] of the (A) to the (B) may be from 8:1 to 1:10, the content of the (C) may be &le0.1% (including 0%), and the total of the contents of the (C) and (D) may be &le0.3% (excluding 0%).COPYRIGHT: (C)2011,JPO&INPIT【課題】染色後の洗髪時における色落ちの解消や染色堅牢性を高めると共に、演色性の悪い蛍光灯下や白熱電球下において、緑味等を帯びることなく自然に美しく見える色味に染色することができ、退色後の色相変化が少なくできるような染毛料組成物を提供する。【解決手段】本発明の染毛料組成物は、少なくとも酸性染料および酸を含有する染毛料組成物において、酸性染料として、(A)赤色504号、(B)橙色205号、(C)黒色401号および(D)紫色401号を夫々含有し、(A)の含有量が0.001~1.0%(「質量%」の意味、以下同じ)、(A)と(B)の配合比率[(A):(B)]が8:1~1:10であると共に、(C)の含有量が0.1%以下(0%を含む)、(C)と(D)の含有量の合計が0.3%以下(0%を含まない)である。【選択図】なし
