Problem to be solved: to provide a kit composition and a dye composition for dyeing hair which can improve the shampoo fastness of the nonionic dye and use nonionic dye as the dye main component, and there is no hydrogen peroxide water, and is capable of producing the coloring hair composition which is excellent in the coloring property and is low skin irritation compared with the conventional hair dye .Solution: the first agent is a dye composition comprising a nonionic dye as the main component of dye, and the second agent is a water dispersing agent of the transition metal fine particle, and the transition metal fine particle is protected by the low molecular organic acid, and transition metal is a transition metal Dye composition kit composition having an average particle size of fine particles of 0.1 to 5.0 nm and a peak value of the cathode current density of the second agent under pHNo selection【課題】非イオン性染料のシャンプー堅牢性を改善し、非イオン性染料を染料主成分として、過酸化水素水がなくとも、伝統的染毛剤に比べて、発色性が良好で、低皮膚刺激性である染毛用組成物を製造できる染毛用キット組成物及び染毛用組成物を提供すること。【解決手段】少なくとも第1剤と第2剤とからなる染毛用キット組成物であって、第1剤は、非イオン性染料を染料主成分とする染料組成物であり、第2剤は、遷移金属微粒子の水系分散剤であり、遷移金属微粒子が低分子有機酸で保護されており、遷移金属微粒子の平均粒子径が0.1~5.0nmであり、第2剤のカソード電流密度の絶対値がpH4以下でピークを有する染毛用キット組成物【選択図】なし
