| 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 in which Col is a non-cationic dye chosen from the group formed by azo dyes, methine dyes, azomethine dyes, phenothiazine dyes, triarylmethane dyes, xanthene dyes, phenanthridine dyes and phthalocyanine dyes, Z is a hydrocarbon group in C1-C20, linear or branched, saturated, unsaturated or cyclic 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 dyes of formula (I) as dyes direct, as well as multi-compartment devices. |