PROBLEM TO BE SOLVED: To provide a hair treatment method which improves the resilience of the hair and the dyeability and dye fastness of hair dyes by penetrating a hydrolyzed protein into and making it adsorbed in the inside of the hair.SOLUTION: The hair treatment method comprises applying on and penetrating into the hair a liquid containing a keratin hydrolyzed product obtained by hydrolyzing animal hair-derived keratin and having a number-average molecular weight of 300-1,000 in the absence of a reducing agent and applying an acid-containing liquid on the hair.COPYRIGHT: (C)2009,JPO&INPIT【課題】加水分解タンパク質を毛髪内部に浸透・吸着させ、毛髪のハリ及び染毛剤の染色性及び染色堅牢性を向上させる毛髪処理方法の提供。【解決手段】還元剤非存在下、獣毛由来のケラチンをアルカリ加水分解して得られる、数平均分子量300~1000のケラチン分解物を含有する液剤を毛髪に塗布して浸透させた後、当該毛髪に酸含有液剤を塗布することを特徴とする毛髪処理方法。【選択図】なし
