PROBLEM TO BE SOLVED: To provide a multi-agent type oxidative hair dye composition that self-heats when mixing a plurality of agents, the composition being obtained such that a reducing agent having a large calorific value is searched for and the temperature of the oxidative hair dye composition is efficiently raised with a small amount of the reducing agent.SOLUTION: According to the present invention, there is provided a multi-agent type oxidative hair dye composition comprising a reduction agent consisting of an oxidation dye (A), an iodide (B), and a reduction agent consisting of iodide (C). The content of the (C) is 0.05% by mass or more. A large calorific value is generated by an oxidation-reduction reaction between the reduction agent consisting of iodide and the oxidation agent. Thus, the oxidative hair dye composition can be efficiently heated to a high temperature with a small amount of reduction agent.SELECTED DRAWING: NoneCOPYRIGHT: (C)2018,JPO&INPIT【課題】本発明の課題は、複数の剤を混合した際に自己発熱する多剤式の酸化染毛剤組成物において、発熱量が大きい還元剤を探索し、少量の還元剤で効率的に酸化染毛剤組成物の温度を高めることである。【解決手段】上記課題を解決するために、(A)酸化染料、(B)酸化剤、及び、(C)ヨウ化物からなる還元剤を含有する多剤式の酸化染毛剤組成物において、前記(C)の含有量が0.05質量%以上であることを特徴とする酸化染毛剤組成物を提供する。ヨウ化物からなる還元剤と酸化剤との酸化還元反応により大きな発熱量が生じるため、少量の還元剤で効率的に酸化染毛剤組成物を高温化することができる。【選択図】なし
