Niaj hnub no, iav vaj huam sib luag tau siv ntau yam khoom siv hauv tsev. Txawm hais tias lawv tau ua kom sov, lawv yog cov iav, uas tuaj yeem tawg yooj yim thaum siv tsis raug. Yog tias nws tawg, feem ntau nws nyuaj rau phim nws nrog cov iav haum. Yog li ntawd, hauv kev siv txhua hnub, sim zam cov xwm txheej hauv qab no uas yuav ua rau iav vaj huam sib luag tawg.
1. Cov ces kaum ntawm tempered iav yog qhov chaw rhiab. Yog tias cov ces kaum ntawm cov iav iav puas lawm, qhov kev pheej hmoo ntawm cov iav tawg nws tus kheej yuav nce ntxiv.
2. Tsis txhob tso khoom hnyav rau ntawm daim iav tempered rau ntev. Feem ntau tempered iav tuaj yeem tiv taus 70-100mpa siab. Qhov siab no sib npaug los ntawm thaj tsam ntawm lub iav yog qhov siab tshaj plaws uas nws tuaj yeem tiv taus. Yog tias qhov hnyav ntawm cov khoom peb tso ntau tshaj qhov muaj peev xwm ntawm iav, iav kuj yooj yim rau tawg.
3. Qhov hloov pauv hnyav nyob rau sab nraud tuaj yeem ua rau iav tawg. Txawm hais tias qhov no tshwm sim tsis tshua muaj, qhov xwm txheej tau tsom mus rau cov teeb roj teeb thiab cov qhov cub roj iav cov txee. Vim yog cov cua sov siv hluav taws xob, iav ua kom sov. Lub sijhawm no, yog tias koj nchuav dej txias rau ntawm iav, qhov sib txawv ntawm qhov nruab nrab ntawm ob qhov kawg ntawm iav yog pom tseeb, tom qab ntawd 90% ntawm iav yuav tawg.
4. Cov kua qaub-puag yuav ua rau iav khov dua. Cov iav yog qhov tseem ceeb silicon dioxide (SiO2), uas ua tshuaj lom nrog cov tshuaj, yog li ua kom deb ntawm cov kua qaub thiab alkali tshuaj hauv iav hauv lub neej txhua hnub.
5. Nws yog txwv tsis pub ntaus lub iav nrog cov khoom nyuaj. Cov pob txhua hnub yog qhov tsis yooj yim sua, tab sis kev ua phem rau ntawm cov khoom hnyav yuav tsum zam, uas tuaj yeem yooj yim ua rau cov iav vaj huam sib luag ntawm cov khoom siv hauv tsev tawg.
