Ua kapa ʻia ʻo Optical brighteners he optical brightening agents a i ʻole fluorescent whitening agents. ʻO kēia nā pūhui kemika e hoʻomoʻa i ka mālamalama i ka ʻāpana ultraviolet o ka spectrum electromagnetic; hoʻopuka hou kēia mau kukui i ka ʻāina uliuli me ke kōkua o ka fluorescence