Turimo gukora ubwoko bwinshi bwa OBA, fluorescent agent. Optical Brightener Agent BBU, izwi kandi ku izina rya fluorescent whitening agent BBU, ni uruganda rukora imiti rukoreshwa mu nganda zitandukanye nk'imyenda, impapuro, na plastike mu rwego rwo kuzamura umucyo n'umweru.