| abstract |
The present invention relates to a process for dyeing keratin fibres, in particular human keratin fibres such as the hair, in which said fibres are treated, in several separate steps, comprising: i) at least one step i) of dyeing said fibres using a cosmetic dye composition A, preferably an aqueous composition, comprising at least a) indigo and/or henna, ii)at least one step ii) of treating said fibres, comprising the application to the fibres of an aqueous composition B which comprises water, optionally b) at least one direct dye, other than henna and indigo, c) a buffer system comprising a mixture of an acid and of at least one conjugate salt thereof, composition B having a pH of less than or equal to 5, iii)optionally at least one step of intermediate rinsing of said fibres, preferably with water, between step i) and step ii) (or between step ii) and i) (depending on the order of steps i) and ii)). |