Tiri kugadzira akawanda marudzi eOBA, fluorescent whitening agent.Optical Brightener Agent BBU, inozivikanwawo sefluorescent whitening agent BBU, ikemikari inoshandiswa mumaindasitiri akasiyana semachira, mapepa, uye mapurasitiki kuwedzera kupenya uye kuchena kwezvigadzirwa.