PROBLEM TO BE SOLVED: To provide a hair dyeing method excellent in easiness of operation, capable of easily providing dyeing without color unevenness and capable of dyeing scalp hair partially or wholly.SOLUTION: The hair dyeing method includes infiltrating a hair dye composition comprising a first agent containing an alkali agent and a second agent containing an oxidizing agent and containing a surfactant in at least either the first agent or the second agent into a structure comprising a flexible porous material having an apparent density of 15-70 kg/m3 and a hardness of 50-250 N, foaming the hair dye composition by performing an operation of deforming the flexible porous material by the application and release of an external force thereto and therefrom, applying the foamy hair dye composition to the hair, leaving it standing for 3-60 min. and washing it off.COPYRIGHT: (C)2010,JPO&INPIT【課題】操作性に優れ、簡便に色むら無く染めることができ、しかも部分染めにも全頭染めにも対応できる頭髪染色方法の提供。【解決手段】アルカリ剤を含有する第1剤と酸化剤を含有する第2剤とを含み、第1剤と第2剤の少なくとも一方に界面活性剤を含有する染毛剤組成物を、見掛け密度が15~70kg/m3であり、硬さが50~250Nである柔軟性多孔質材料を含む構造体に含浸させ、柔軟性多孔質材料に対する外力の付与と解放によってこれを変形させる操作を行うことで泡立て、この泡状の染毛剤組成物を毛髪に適用し、3~60分間放置した後、洗い流すことによる頭髪染色方法。【選択図】なし
