Raw cov khoom siv ua ntej. Tej khoom siv (quartz xuab zeb, dej qab zib tshauv, limestone, feldspar, etc.) yog siv cov khoom ntub ziab qhuav, thiab cov khoom siv hlau uas muaj hlau yog raug tshem tawm cov tshuaj tua kab mob kom pom tseeb ntawm cov iav.
Kev npaj ntawm cov khoom siv batch.
Qhuav. Cov khoom siv iav ua kom sov siab (1550 ~ 1600 degrees) nyob rau hauv ib lub mis los yog ib qho uas ua rau lub plhaub taum plob, uas ua raws li qhov yuav tsum tau ua.
sib sau. Cov iav kua yog ua tiav rau hauv cov khoom ntawm ib yam kev xav, xws li cov ntawv plag, cov tais diav, thiab cov zoo li.
Tshav kub kho. Los ntawm kev sib sab laj, quenching, thiab lwm yam., Kev ntxhov siab, sib cais sib cais los yog crystallization hauv lub khob yog tshem tawm los yog generated, thiab lub xeev ntawm cov iav hloov.
