Optical brightener agent NFW ndi imodzi mwazinthu zowunikira kwambiri za thonje padziko lapansi.Oyenera kuyera ndi kuwala kwa thonje ulusi, polyacrylamide, mapuloteni CHIKWANGWANI ndi nayiloni, oyenera pad utoto ndondomeko.

Ili ndi kukana bwino kwa chlorine ndi oxygen bleaching, acid ndi alkali.Kutentha kwapamwamba, koyenera kusamba kumodzi ndi poliyesitala wonyezimira woyera, ngakhale mu 180 ~ 190 ℃ ndi polyester brightener thermo fixation color, nayenso sadzakhala chikasu.Yankho lamadzi la mankhwalawa ndi losavuta kusinthidwa kukhala biodegraded ndipo ndi la mankhwala oteteza chilengedwe.