Fluorescent whiteners-Lwm yam

Lus piav qhia luv luv:

Whitening tus neeg sawv cev yog ib yam ntawm cov organic compound uas tuaj yeem txhim kho cov xim dawb ntawm fiber ntau thiab ntawv.Kuj hu ua optical brightener, fluorescent brightener.Npuag, thiab lwm yam, feem ntau yog daj vim xim impurities.Yav dhau los, tshuaj bleaching tau siv los decolorize lawv los ntawm kev ntxiv cov tshuaj dawb rau cov khoom.