The present invention relates to thiol/disulphide azo quinolinium compounds for dyeing keratin fibres. The invention relates to a dye composition comprising a particular thiol/disulphide azo quinolinium chromophore-containing thiol or disulphide dye, and to a process for dyeing keratin fibres such as the hair, using said composition. It similarly relates to novel particular thiol/disulphide azo quinolinium chromophore-containing dyes and to the uses thereof in dyeing keratin fibres. The dyeing process according to the invention makes it possible to dye keratin fibres without damaging them, in a manner which is particularly persistent with respect to shampooing operations and common attacks. Moreover, the novel dyes according to the invention extend the colour range to violets and blues. This process also makes it possible to dye bleached keratin fibres in a strong and chromatic manner.
本发明涉及用于染色角蛋白纤维的巯基/二
硫键偶氮
喹啉化合物。本发明涉及一种
染料组合物,包括特定的巯基/二
硫键偶氮
喹啉色团含有巯基或二
硫键
染料,并且涉及一种用于染色角蛋白纤维(如头发)的工艺,使用该组合物。它同样涉及新的特定巯基/二
硫键偶氮
喹啉色团含有
染料及其在染色角蛋白纤维中的用途。本发明的染色工艺使得能够在不损害角蛋白纤维的情况下染色,其染色效果在洗发和常见的攻击方面特别持久。此外,本发明的新
染料扩展了紫色和蓝色的色彩范围。此工艺还使得能够强烈和色彩鲜艳地染色漂白的角蛋白纤维。