COMPOSITION CONTAINING A SPECIFIC DIRECT DYE FOR DYEING CREATINE FIBRES TO LIGHTER THAN NATURAL COLOURS

摘要

A method for dyeing keratin fibers such as human hair by applying to the fibers a dye composition, in particular a lightening dye composition, containing, in a medium which is suitable for dyeing, at least one direct dye to be mixed at the time of use, at basic pH, with an oxidizing agent, wherein the dye composition a has a basic pH and contains, as direct dye, at least one dye containing an optionally delocalizable quaternized nitrogen atom and a -Z=N- bond in which Z denotes a nitrogen atom or a -CH- radical. The invention is also directed to a ready-to-use composition and a multi-compartment dyeing device for dyeing keratin fibers.