Sikhiqiza izinhlobo eziningi ze-OBA, i-fluorescent whitening agent. I-Optical Brightener Agent BBU, eyaziwa nangokuthi i-fluorescent whitening agent BBU, iyinhlanganisela yamakhemikhali esetshenziswa ezimbonini ezihlukahlukene ezifana nezindwangu, amaphepha, namapulasitiki ukuze kuthuthukiswe ukugqama nokuba mhlophe kwemikhiqizo.