I-agent emhlophe luhlobo lwe-organic compound enokuphucula ubumhlophe belaphu lefiber kunye nephepha.Ikwabizwa ngokuba yi-optical brightener, i-fluorescent brightener.Amalaphu, njalo njalo, ahlala etyheli ngenxa yobumdaka bombala.Ngaphambili, i-chemical bleaching yayisetyenziselwa ukuyisusa umbala ngokudibanisa ii-agent ezimhlophe kwiimveliso.