Rin Ala Fabric Whitener is suitable for use on White Cottons & Terrycots.Your Rin Ala Fabric Whitener should be used BEFORE washing clothes with detergent.Before wash, soak your clothes in 2 caps of Rin Ala Fabric Whitener for 30 minutes.Rin Ala Fabric Whitener lets nothing come in the way of dazzling whites, not even tough stains.