| abstract |
A laundry treatment composition comprises: (i) from 2 to 70 wt% of a surfactant, and from 0.0001 to 0.1 wt% of an azine dye, wherein the dye is of the following core structure, wherein Ra, Rb, Rc and Rd are selected from: H, a branched or linear C1 to C7-alkyl chain, a benzyl, a phenyl, and a naphthyl; the dye is substituted with at least one SO3 <-> or -COO<->; the B ring does not carry a negatively charged group or salt thereof; and the A ring may further substituted to form a naphthyl; the dye is optionally substituted by groups selected from: amine, methyl, ethyl, hydroxyl, methoxy, ethoxy, phenoxy, Cl, Br, I, F, and NO2. |