Process for dyeing leather with trichromatic dye mixtures.

摘要

LEATHER COLORING DYES CONTAINING MIXTURES ARE USED TWO METAL DYE FREE, of which one contains two to eight sulfo groups and the other contains three to eight sulfo groups. The mixture contains at most TWO GROUPS dyestuff sulfonic acid. Preferably uses a mixture of three dyes CROMADOS containing at least a yellow dye of formula (I), AT LEAST ONE RED formula (2) DYE O (2A) AND AT LEAST ONE blue dye of formula (3) according to claim (2). THIS dye mixture may be colored bright shades LEATHER.