Optical brightener OB-1 ndi kuwala kowala kwa fiber 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.