Patent ID: 7686851

Claim:
A concentrated storage-stable aqueous dye solution comprising a) 7% to 20% by weight of a dye of the formula wherein K is a coupling component of the formula (2) wherein Y 1 and Y 2 are ═O, Y 3 is ═O or ═N—CN, and R 1 and R 2 are H, b) 0.4 to 0.9 mol of 2-(2-aminoethoxy)ethanol, 3-dimethylamino-1-propanol or N-(2-hydroxyethyl)piperazine per mole of the dye of the formula (1) and c) 0.8 to 2.5 mol of at least one trialkanolamine per mole of the dye of the formula (1).