I-Optical brightener i-OB-1 iyi-optical brightener ye-polyester fiber, futhi isetshenziswa kabanzi ku-ABS, PS, HIPS, PC, PP, PE, EVA, i-PVC eqinile namanye amapulasitiki. Inezici zomphumela omuhle kakhulu wokumhlophe, ukuzinza okuhle kakhulu kokushisa njll.