| abstract |
The invention relates to a process for dyeing and/or lightening keratin fibres such as the hair, using i ) at least one direct dye bearing a disulfide, thiol or protected-thiol function and ii ) at least one non-cellulose-based thickening organic polymer, iii ) at least one alkaline agent, iv ) at least one reducing agent and optionally v ) at least one surfactant. The invention also relates to a composition comprising the ingredients i ) to iv ) and optionally v ), to the use of the combination of i ), ii ), iii ), iv ) and optionally v) for the dyeing and/or lightening of keratin fibres, and to a multi-compartment kit comprising the ingredients i ) to iv ) and optionally v ). The dyeing process and the composition according to the invention especially afford a long-lasting coloration on keratin fibres, which is strong, chromatic and/or homogeneous, with or without the use of an oxidizing agent. |