Wella Aktiengesellschaft

Vèronique Buclin-Charrière

Laurent Chassot

Guido Sauter

David Rozzell

Juergen Allwohn

Cècile Pasquier

Pro-dyes of direct dyes having an enzymatically-labile functionality, e.g. glutaramide derivatives of direct dyes of formula (I) or their physiologically acceptable salts, are described, as well as compositions for dyeing keratinous fibers containing these pro-dyes, as well as compositions for dyeing keratinous fibers containing a combination of at least one pro-dye and at least one enzyme capable of cleaving the glutaramide functionality in the pro-dye. A method for dyeing keratinous fibers with the aforementioned dyeing compositions is also described.

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Morlon, Switzerland

Vèronique Buclin-Charrière