Optical brightener OB-1 ke mochini o khanyang o sebetsang hantle oa polyester fiber, 'me o sebelisoa haholo ho ABS, PS, HIPS, PC, PP, PE, EVA, PVC e thata le lipolasetiki tse ling. E na le litšobotsi tsa phello e ntle ea bosoeu, botsitso bo botle ba mocheso joalo-joalo.