Georg Knübel

Brightening and/or dyeing agent with urea derivatives

Ionic-liquid-containing products for dyeing and/or brightening keratin fibres

Mittel zum Färben und/oder Aufhellen keratinischer Fasern mit neuartigen Wirkstoffen

Agent, useful for coloring and/or brightening keratin fibers, preferably human hair, comprises specific amount of one or more formic acid ester and imido formic acid ester

Product for lightening the color of keratinic fibers, especially hair, comprises an acylpyridinium derivative, an imidazole compound and hydrogen peroxide

New dye precursor combinations

Agent, useful for the treatment of keratin fibers, preferably human hair, comprises at least a bisulfite adduct of a diisocyanate and/or a trisulfite adduct of a triisocyanate in a cosmetically acceptable medium

Dyeing of keratin fibres using indolines with metal catalysis.

Combinations of dye precursors comprising a diaminopyrazole derivative, an m-aminophenol derivative and a pyrimidin derivative

Developer components for oxidation hair dyes