PROBLEM TO BE SOLVED: To provide a second agent composition for dyeing hair, easily mixing with a first agent composition for dyeing the hair, excellent in flowability, and also enabling to constitute an oxidation type hair dyestuff dyeing even white hairs well, and also the oxidation type hair dyestuff constituted by the second agent composition for dyeing the hair.SOLUTION: This second agent composition for dyeing the hair constituting the oxidation type hair dyestuff together with the first agent composition for dyeing the hair, blended with an oxidation dyestuff, and mixed with the first agent composition for dyeing the hair on being used is characterized by blending at least (A) an ampholytic surfactant, (B) an ester type nonionic surfactant, (C) an oily component and (D) hydrogen peroxide, and having a pH of 2 to 5. The oxidation type hair dyestuff is constituted by the first agent composition for dyeing the hair and the second agent composition for dyeing the hair.COPYRIGHT: (C)2009,JPO&INPIT【課題】 染毛用第1剤組成物と混合し易く、かつ流動性にも優れ、しかも、白髪であっても良好に染色し得る酸化型染毛剤を構成可能な染毛用第2剤組成物と、前記染毛用第2剤組成物により構成される酸化型染毛剤を提供する。【解決手段】 酸化染料が配合された染毛用第1剤組成物と共に酸化型染毛剤を構成し、使用に際して前記染毛用第1剤組成物と混合される染毛用第2剤組成物であって、少なくとも、(A)両性界面活性剤、(B)エステル型非イオン性界面活性剤、(C)油性成分、および(D)過酸化水素が配合されており、pHが2~5であることを特徴とする染毛用第2剤組成物と、前記染毛用第1剤組成物および前記染毛用第2剤組成物によって構成される酸化型染毛剤により、前記課題を解決する。【選択図】 なし
