Patent ID: 8439980
Filing Date: 2013-05-14
Classification: C09B,C11D

Abstract:
1. A method of treating a textile, the method comprising the steps of: (i) treating a textile with an aqueous solution of a blue or violet cationic azine dye, the aqueous solution comprising from 1 ppb to 1 ppm of the blue or violet cationic azine dye; and, from 0.0 g/L to 3 g/L of a surfactant; and, (ii) optionally rinsing and drying the textile, wherein the blue or violet cationic azine dye is not covalently bound to a negatively charged substituent, the azine dye selected from the following structure: wherein An− is a negative anion; rings A and B are absent or only one of rings A and B are present; Y is selected from: —NHAr, wherein Ar is unsubstituted or substituted and is naphthyl or phenyl; X is selected from H; C1-C4 branched or linear alkyl;  and when Y is selected from:  X may also be selected from—NR