PROBLEM TO BE SOLVED: To provide a multi-agent type hair treatment agent and a hair treating method which can control penetration of hydrolyzed keratin and derivatives thereof into hair.SOLUTION: The multi-agent type hair treatment agent comprises a pretreatment agent with tannic acid blended therein and a posttreatment agent with hydrolyzed keratin or hydrolyzed keratin derivatives blended therein, and the hair treatment method treats hair with the multi-agent type hair treatment agent.SELECTED DRAWING: Figure 1【課題】加水分解ケラチンやその誘導体の毛髪への浸透性を制御できる多剤式毛髪処理剤、及び毛髪処理方法の提供。【解決手段】多剤式毛髪処理剤は、タンニン酸が配合された前処理剤と、加水分解ケラチン又は加水分解ケラチン誘導体が配合された後処理剤であり、毛髪処理方法は、その多剤式毛髪処理剤で毛髪を処理する。【選択図】図１
