A hair treatment method comprising the steps of:
(a) optionally bleaching hair by applying a bleaching composition comprising from ammonium carbonate or a divalent metal cyanate and a source of hydrogen peroxide;
(b) dyeing the hair by applying a colouring composition comprising a sulphur-containing nucleophile and a dye compound selected from a dye class other than the class of reactive dyes; and
(d) removing colour from the hair by applying a colour removal composition comprising a sulfur-containing nucleophile or a precursor thereof.
一种头发处理方法,包括以下步骤
(a) 使用漂白组合物漂白头发,该组合物包括
碳酸铵或二价
金属
氰酸盐和
过氧化氢;
(b) 使用染色组合物给头发染色,该组合物由含
硫亲核物和选自活性
染料类以外 的
染料类的
染料化合物组成;以及
(d) 使用由含
硫亲核物或其前体组成的除色组合物,除去头发上的颜色。