Patent ID: 8034129

Claim:
A storage stable aqueous dye solution consisting of: a) 5 to 30% by weight of an anionic or cationic direct dye; b) 0.01 to 5% by weight of a compound of formula (1) wherein M is hydrogen, an alkali metal or alkaline earth metal, ammonium or ammonium that is mono-, di-, tri- or tetra-substituted by C 1 -C 4 alkyl or C 2 -C 4 hydroxyalkyl or mixtures thereof; c) 0 to 10% by weight of an inorganic or an organic acid; d) 0 to 20% by weight of further additives, said further additives selected from the group consisting of water-soluble organic solubilizers, hydrotropic agents, viscosity regulators, dispersing agents, microbiocides, and pH adjusting agents; and e) water to complete to 100%; with the proviso that direct dyes of formula (2) wherein K is a residue of a coupling component of an acetoacetanilide, a pyridone, a pyrazolone, or a pyrimidine; and M is as defined above, are excluded.