The invention concerns the use as direct dyeing agent of at least one tetraazapentamethine compound, a dyeing composition comprising at least such a compound, as well as a method for dyeing keratinous fibers, in particular human keratinous fibers and more particularly hair, which consists in applying at least one composition comprising such a compound. The composition also concerns tetra-azapentamethine compounds of formula (I). The invention further concerns a method for bleaching such compounds, as well as bleaching keratinous fibers previously dyed therewith.
本发明涉及至少一种四氮杂五
甲烷化合物作为
直接染料剂的用途,包括至少一种该化合物的
染料组合物,以及一种用于染色角蛋白纤维的方法,特别是人类角蛋白纤维,更特别是头发,该方法包括应用至少一种包含该化合物的组合物。该组合物还涉及式(I)的四氮杂五
甲烷化合物。本发明还涉及一种漂白该类化合物的方法,以及先前用其染色的角蛋白纤维的漂白方法。