PROBLEM TO BE SOLVED: To provide an oxidative hair dye or bleaching agent composition excellent in cavity-repairing effect on damaged hair and capable of giving good finish with luster like healthy hair.SOLUTION: The oxidative hair dye or bleaching agent composition is used by mixing a first agent containing an alkaline agent with a second agent containing hydrogen peroxide, wherein the mixture contains >0.5 mass% of a guanidium salt and >2.0 mass% of an aromatic alcohol which is liquid at ordinary temperature, and when the content of the guanidium salt is regarded as mass% (a) and the content of the aromatic alcohol which is liquid at ordinary temperature is regarded as mass% (b), (a-0.5)*(b-2.0)≥1.0 is satisfied and the pH of the mixture is 8.0-11.5.COPYRIGHT: (C)2013,JPO&INPIT【課題】ダメージ毛の空洞補修効果に優れ、健常毛のような良好なツヤのある仕上がりを得ることができる酸化型染毛剤又は脱色剤組成物の提供。【解決手段】アルカリ剤を含有する第1剤と過酸化水素を含有する第2剤を混合して使用する染毛剤組成物又は脱色剤組成物であって、混合物中に0.5質量%を超える量のグアニジウム塩及び2.0質量%を超える量の常温で液体の芳香族アルコールを含有し、グアニジウム塩の含有量をa質量%、常温で液体の芳香族アルコールの含有量をb質量%としたとき、(a-0.5)*(b-2.0)≧1.0を満足し、混合物のpHが8.0~11.5である酸化型染毛剤又は脱色剤組成物。【選択図】なし
