PROBLEM TO BE SOLVED: To provide a hair dyeing method causing no skin damage even if a two-pack-type hair dye composition wherein one liquid preparation contains a hydrogen peroxide solution is used.SOLUTION: Prior to hair dyeing using a two-pack-type hair dye composition wherein one liquid preparation contains a hydrogen peroxide solution, pretreatment is carried out by mixing the liquid preparation containing the hydrogen peroxide solution and hydrogen water with a hydrogen concentration of 1 ppm or more to prepare a mixed solution, applying the mixed solution onto the scalp and hair and allowing the mixed solution to leave for a predetermined period.COPYRIGHT: (C)2013,JPO&INPIT【課題】一方の液剤が過酸化水素水を含有する2液タイプの染毛剤組成物を用いても、皮膚障害が生じない染毛方法を提供する。【解決手段】一方の液剤に過酸化水素水を含有する2液タイプの染毛剤組成物を用いて染毛施術を行う前に、前記過酸化水素水を含有する液剤と、水素濃度が1ppm以上の水素水とを混合して混合液を調製し、当該混合液を頭皮及び頭髪に塗布し、所定時間放置する前処理を施す。【選択図】 なし
