Optical brightener OB-1 ndi yowunikira bwino ya poliyesitala, ndipo imagwiritsidwa ntchito kwambiri mu ABS, PS, HIPS, PC, PP, Pe, EVA, PVC yolimba ndi mapulasitiki ena. Ili ndi mawonekedwe abwino kwambiri a whitening, kukhazikika bwino kwamafuta etc.