Optical Dyes

Optical brighteners yog cov khoom siv hluavtaws uas ntxiv rau cov kua thiab cov tshuaj ntxuav tes kom cov khaub ncaws zoo nkauj, ci dua thiab huv dua.Lawv yog cov niaj hnub hloov pauv rau xyoo kaum xyoo qub txheej txheem ntawm bluing ntxiv me me ntawm xiav dye rau ntaub kom nws zoo li whiter.