| 摘要 |
The invention provides a process for dyeing a textile substrate comprising wool fibres, which process comprises bringing the substrate into contact with an aqueous dyebath containing an acid dyestuff or a mixture of acid dyestuffs having (a) a build-up power on wool of from 90 to 98% at pH 4.5; together with (b) a migrating ability on wool of from 25 to 40%, at pH 4.5; (a) and (b) being determined under specific conditions, in the presence of a levelling agent which is the alkoxylation product of an amine substituted by a fatty saturated or unsaturated residue, the aqueous dyebath containing a mixture of acid dyestuffs when the substrate is a wool/synthetic polyamide fibre blend. These dyestuffs give level, fast and reproducible dyeings of a high quality. |
