Ua ntej tshaj plaws, nws yog ib qho tsim nyog los tsim thiab tsim cov pwm. Cov iav raw khoom feem ntau yog ua los ntawm quartz xuab zeb, thiab lwm yam khoom siv yog melted rau hauv lub xeev ua kua ntawm qhov kub thiab txias, thiab ces ncuav rau hauv pwm, txias, txiav, thiab tempered los ua ib lub raj mis iav. Cov iav fwj feem ntau muaj lub logo nruj, thiab lub logo kuj yog ua los ntawm cov pwm pwm. Raws li kev tsim khoom, molding ntawm iav fwj tuaj yeem muab faib ua peb hom: phau ntawv tshuab, tshuab tshuab thiab extrusion molding. Cov iav fwj tuaj yeem muab faib ua hom hauv qab no raws li qhov muaj pes tsawg leeg: ib qho yog sodium iav, lwm qhov yog iav iav, thiab qhov thib peb yog iav borosilicate.

Cov ntaub ntawv tseem ceeb ntawm cov iav fwj yog ntuj ore, quartz pob zeb, caustic soda, limestone thiab lwm yam. Cov iav fwj muaj qhov pom tseeb siab thiab tiv thaiv corrosion, thiab cov khoom siv yuav tsis hloov thaum sib cuag nrog cov tshuaj feem ntau. Cov txheej txheem tsim khoom yog yooj yim, cov duab yog dawb thiab hloov tau, lub hardness siab, kub-resistant, huv si, yooj yim los ntxuav, thiab muaj cov yam ntxwv ntawm kev siv dua. Raws li cov ntaub ntawv ntim, iav fwj yog tsuas yog siv rau zaub mov, roj, cawv, dej haus, condiments, tshuaj pleev ib ce thiab kua tshuaj, thiab lwm yam, thiab lawv muaj ntau yam. Tab sis iav fwj kuj muaj nws qhov tsis zoo, xws li qhov hnyav hnyav, kev thauj mus los thiab cov nqi khaws cia, thiab tsis muaj kev cuam tshuam.