| abstract |
Method for dyeing leather with at least one anionic polyazocolouring F having at least 3 diazogroups and at least one alkaline activatable group of the formula A; ** (See formula) ** 5 where ---- means the bond to the dye molecule, X represents C1-C4 alkyl or C1-C4 alkoxy, k represents 0, 1, 2 or 3, n means 0 or 1, and B represents a group CH = CH2 or a group CH2-CH2-Q, where Q represents a dissociable group under alkaline conditions, which comprises treating the leather with an aqueous immersion bath containing at least one dye F, at a pH value of at least pH 8 and maximum pH 11. |