| abstract |
The subject of the invention is a dye composition for dyeing human keratin fibers and more particularly the hair, comprising a direct trication dye of formula (I), Col-Z-Pass in which Col is a monocation dye chosen from the group formed by azo dyes, methine cyan dyes and phenothiazine dyes, Z is a linear or branched, saturated or unsaturated C 1 -C 20 hydrocarbon group comprising at least one nitrogen atom and carrying a positive charge, as well as the processes for dyeing human keratin fibers using it, the use of dyes of formula (I) as direct dyes, as well as devices with several compartments. |