Cov txheej txheem ntws ntawm lub raj mis kom zoo nkauj

(1) Raw khoom ua ntej.Cov ntaub ntawv loj heev (quartz xuab zeb, dej qab zib, limestone, feldspar, thiab lwm yam) yog crushed kom qhuav cov ntaub ntawv raw, thiab cov hlau uas muaj raw cov ntaub ntawv raug kho nrog hlau tshem tawm los xyuas kom meej qhov zoo ntawm iav.

(2) Kev npaj cov khoom sib xyaw.

(3) melted.Cov iav sib txuam cov khoom siv hauv pas dej da dej lossis pas dej ua ke rau qhov kub thiab txias (1550 ~ 1600 degrees) cua sov, kom cov khoom sib xws, tsis muaj npuas, thiab ua tau raws li qhov yuav tsum tau ua ntawm cov kua iav.

(4) puab.Muab cov iav ua kua rau hauv pwm kom ua cov khoom iav ntawm qhov xav tau