The present invention relates to the dyeing of keratin materials using two colorless dye precursors, at least one of which contains a disulfide/thiol unit, said precursors reacting together chemically to form the color in situ. The process according to the invention makes it possible in the context of certain variants to solve the problems caused by the color generated during the process, while at the same time not degrading the efficacy of the coloration, and especially of the lightening effect. The colorations obtained are moreover powerful, chromatic, sparingly selective, and fast with respect to external agents such as sunlight, perspiration and especially shampoo.
本发明涉及使用两种无色
染料前体对角蛋白材料进行染色,其中至少一种含有二
硫化物/巯基单元,这些前体在
化学上相互反应以在原位形成颜色。根据本发明的方法使得在某些变体情况下能够解决染色过程中产生的问题,同时不降低染色的功效,特别是减淡效果。所获得的染色品不仅强大、色彩鲜艳、选择性较少,而且对于阳光、汗
水和尤其是洗发
水等外部因素具有快速的耐久性。