Anyị na-emepụta ọtụtụ ụdị OBA, ihe na-acha ọcha fluorescent. Optical Brightener Agent BBU, nke a makwaara dị ka onye na-acha ọcha fluorescent BBU, bụ ngwakọta kemịkalụ nke a na-eji na ụlọ ọrụ dị iche iche dị ka textiles, akwụkwọ, na plastik iji kwalite ncha na ọcha nke ngwaahịa.