Agent and process for dyeing and tinting keratinous fibres

摘要

Formulations for coloring keratinous fibers are provided, comprising a substantive dye, an aminopolycarboxylic acid or salt thereof with a physiologically compatible cation, and isoascorbic acid or a salt thereof with a physiologically compatible cation. Also provided are methods of coloring keratinous fibers with the formulations.