iav yog lub khob ua los ntawm iav. Tam sim no, siab borosilicate iav nrog kev nyab xeeb siab thiab zoo zoo belongs rau high borosilicate iav, uas yog raug rho tawm haujlwm ntawm qhov kub ntawm ntau tshaj 600 degrees, yog li nws muaj kub kub tsis kam. Txawm li cas los xij, qhov tseeb, thaum peb yuav cov tsom iav, peb tuaj yeem yuav cov khoom tsis raug, thiab thaum siv cov khoom tsis raug, lawv tuaj yeem tawg vim kev siv tsis raug.
Vim li cas lub iav tawg? Yog vim li cas tsis muaj dab tsi ntau dua li vim qhov kub thiab txias sib txawv ntawm sab hauv thiab sab nraud ntawm iav. Qhov ntawd txhais li cas? Qhov no txhais tau hais tias qhov kev tso cai tam sim ntawd kub qhov sib txawv ntawm cov dej qab zib-kua txiv iav zoo tib yam tsuas yog 50 degree. Uas yog hais tias, yog hais tias chav tsev kub yog 25 degree, thiab dej siab tshaj 75 degree yog txhaj rau hauv ib lub khob zoo tib yam, lub puab phab ntsa yog rhuab sai heev thiab sab nrauv phab ntsa yog nyem, thiab lub khob yuav tawg.
Ntxiv mus, lub hauv qab ntawm lub khob yog Ameslikas qhov chaw uas lub iav yog stretched heev, thiab nws yog ib tug kuj tsis yooj yim sua, yog li ntawd nws yog ib tug siab tshwm sim uas cov dej kub yog pheej txhaj rau hauv lub khob.
Nws tsis yog tsom iav xwb uas tawg. Zoo li tempered iav, tableware kuj tuaj yeem tawg. Vim tempered iav yuav tawg. Qhov no yog vim hais tias nyob rau hauv lub txias theem ntawm zus tau tej cov saum npoo hardens thiab shrinks ua ntej, thiab muaj ib tug outwardly expanding siab nyob rau hauv lub tempered iav. Yog hais tias lub siab sab nraud ntawm lub iav nto tsis sib npaug, nws tus kheej tawg yuav tshwm sim.
Yog li ntawd, nrog kev siv cov iav, nws yog qhov zoo tshaj plaws tsis txhob siv dej kub thiab dej txias ua ke, rau kev nyab xeeb, nws yog qhov zoo tshaj plaws los siv dej txias.
