Xim Roj Hmab Khoom Tsim Txujci
Cov txheej txheem xim ntawm cov khoom siv roj hmab tsuas yog muaj cov xim tha xim sab hauv thiab xim ntawm cov khoom sib xyaw. Nyob rau cov lus saum npoo av, tus neeg sawv cev xim siv tshuaj tsuag mus rau saum npoo ntawm cov roj hmab kab lus kom xim cov kab lus roj hmab. Cov txheej txheem muaj qee qhov cuam tshuam rau cov khoom lag luam zoo li qub, thiab rau cov khoom lag luam zoo, cov colorant tau yooj yim tev tawm thiab ploj mus. Kev sib xyaw xim tam sim no tam sim no yog lub ntsiab ntawm cov xim roj hmab, ob txoj hauv kev: kev daws teeb meem thiab cov txheej txheem sib tov. Ntawm lawv, cov txheej txheem sib xyaw muaj ntau txoj kev xws li cov hmoov qhuav qhuav, xim pleev xim rau xim, xim pellet thiab cov xim masterbatch.
