| abstract |
The subject of the invention is a dye composition for dyeing human keratin fibers and more particularly the hair, comprising a direct polycationic dye of formula (I), Col-Z-Col (I) in which Col represents a monocationic dye chosen from among group formed by azo, methine, azomethine and phenothiazine dyes, Z is a linear or branched, saturated or unsaturated C1-C20 hydrocarbon group comprising at least one nitrogen atom and carrying at least two cationic charges, as well as the processes for dyeing human keratin fibers using it, the use of the dyes of formula (I) as direct dyes, as well as devices with several compartments. |