Patent ID: 8506653

Claim:
An aqueous direct dye formulation, comprising (a) 5 to 25% by weight of a direct dye composition comprising (a1) 50-99% by weight of one or more dyes obtainable by reduction or thermal treatment of Direct Yellow 11, and (a2) 1-50% by weight of a blue, black and/or red direct dye, (with weight % of (a1) and (a2) based on the direct dye composition (a)) (b) up to 0.9% by weight of a saturated, cyclic or acyclic water-soluble amine comprising a primary, secondary or tertiary amino group and at least one further functional group selected from primary, secondary and tertiary amino groups, OH groups and ether groups, and (c) up to 0.9% by weight of urea; and (d) water, wherein the percentages for (a), (b), and (c) relate to the total weight of the aqueous direct dye formulation, wherein the saturated, cyclic or acyclic water-soluble amine (b) is present in an amount of 100 ppm to 0.1% by weight of the total weight of the aqueous direct dye formulation.