The following: a combination thereof, or metal salts of Group IV or i) Group III, applying to the hair a composition containing aluminum chloride, preferably ii) a method comprising the step of washing the hair is subsequently processed hair.下記:i)第III族もしくは第IV族の金属塩又はこれらの組み合わせ、好ましくはアルミニウムクロリドを含む組成物を髪に適用し;ii)続いて髪を洗う段階を含む、髪を処理する方法。