| abstract |
The invention concerns dyeing formulations consisting of the following elements: a) at least a dye selected from the group comprising hardly water-soluble dyes a1) and water-soluble dyes a2), b) water, c) in the case of hardly water-soluble dyes a1), at least a dispersant and d) at least a compound of formula (I), wherein the variables are defined as follows: R 1 , R 2 are selected independently of each other from the group consisting of hydrogen, C 1 -C 4 alkyl, CH 2 —O—R 3 , R 3 representing hydrogen or C 1 -C 4 alkyl. |