OB can be widely used in PVC, PS, ABS, PE, PP plastic, owing to its superior fluorescent whitening effect, good thermal stabilit ... OB can be widely used in PVC, PS, ABS, PE, PP plastic, owing to its superior fluorescent whitening effect, good thermal ... acrylic acid brightening. Fluorescent Whitening Agent OB can be shared with the dye have a special brightness, this effect in color ...