Patent ID: 7201779

Claim:
A dye composition comprising, in a suitable dyeing medium, at least one mixed direct dye, said mixed direct dye comprising at least two different chromophores linked together via a linker, the chromophores being chosen such that the at least one mixed direct dye, when present in the composition in an amount of 4.7×10 −4 mol of dye per 100 g of composition, gives, in a standardized coloration test on a lock of hair comprising 90% white hairs, the following values in the L*a*b* colorimetric system: if a*≧0 and b*≧0, then a* ranges from 0 to 20, and b* ranges from 0 to 40; if a*≦0 and b*≧0, then a* ranges from −27 to 0, and b* ranges from 0 to 40; if a*≧0 and b*≦0, then a* ranges from 0 to +9, and b* ranges from −10 to 0; if a*≦0 and b*≦0, then a* ranges from −14 to 0, and b* ranges from −21 to 0.