... . It can be used for whitening thermoplastic plastics, PVC, PS, PE, PP, ABS, Acetate fiber, paint, coating, printing ink, etc. It can be ... as special marks in identify fakless material if used in printing ink.DIRECTION FOR USAGE: Thoroughly dispersed in all those polymers.If any ... : Should be stored in cool and dry place. Optical Brightener for printing ink /OB 184