The invention relates to a process for dyeing and/or lightening keratin materials, in particular keratin fibres, preferably human keratin fibres such as the hair, using at least one fluorescent direct dye bearing a disulfide, thiol or protected-thiol function and comprising at least one aliphatic chain of formula (I): A – (X)p – Csat – S – U. The invention also relates to the use i) of at least one fluorescent direct dye bearing a disulfide, thiol or protected-thiol function (I) combined with ii) steam and/or a heating iron for straightening keratin fibres, for dyeing and lightening keratin materials, and to novel fluorescent direct dyes bearing a disulfide, thiol or protected-thiol function of formula (I): A – (X)p – Csat – S – U, and also a cosmetic composition comprising same. The process used and the use of the thiol, protected-thiol or disulfide fluorescent direct dyes of formula (I) combined with steam makes it possible especially to obtain long-lasting colouring with care valency on keratin materials.
本发明涉及一种用于染色和/或漂白角蛋白质材料,特别是角蛋白质纤维,优选人类角蛋白质纤维(如头发)的过程,使用至少一种带有二
硫键,巯基或受保护巯基功能并且包含式(I)中的至少一种脂肪链的荧光
直接染料:A -(X)p - Csat-S-U。本发明还涉及i)至少一种带有二
硫键,巯基或受保护巯基功能(I)的荧光
直接染料与ii)蒸汽和/或加热熨斗结合用于拉直角蛋白质纤维,用于染色和漂白角蛋白质材料,以及具有相同的新型带有二
硫键,巯基或受保护巯基功能的荧光
直接染料的化妆品组合物。所使用的过程和式(I)的巯基,受保护巯基或二
硫键荧光
直接染料与蒸汽结合使用,尤其是可以在角蛋白质材料上获得具有护理价值的持久染色。