Abstract: A composition containing a sparingly soluble or insoluble dyestuff which comprises, as a processing agent, from 0.5 to 50 percent by weight of the composition of at least one water-soluble non-ionic compound of the formula Y--O--Z--H wherein Y represents a hydrogen atom or a group of the formula ##STR1## (in which X is a carbon atom or an aromatic ring system having from 6 to 10 carbon atoms, and R.sup.1, R.sup.2 and R.sup.3, which may be the same or different, represent hydrogen atoms, or alkyl or alkenyl groups, with the proviso that at least one of R.sup.1, R.sup.2 and R.sup.3 is other than a hydrogen atom and the total number of carbon atoms in R.sup.1, R.sup.2 and R.sup.3 is not more than 36); and Z represents a (C.sub.2 H.sub.4 O).sub.m or (C.sub.3 H.sub.6 O).sub.n group or a combination thereof (in which m and n, which may be the same or different, each represents an integer from 2 to 15), and which may additionally contain water, at least one water-soluble anionic compound of formula R.sup.4 --SO.sub.