Lub luag hauj lwm ntawm strontium carbonate nyob rau hauv glaze: frit yog ua ntej smelt raw khoom los yog ua ib lub khob iav, uas yog ib tug nquag siv flux raw khoom rau ceramic glaze. Thaum ua ntej smelted rau hauv flux, feem ntau ntawm cov roj tuaj yeem raug tshem tawm los ntawm cov khoom siv glaze, yog li txo qhov tsim ntawm npuas thiab qhov me me ntawm cov ceramic glaze nto. Qhov no yog qhov tshwj xeeb tshaj yog rau cov khoom siv ceramic nrog kub kub kub thiab lub voj voog luv luv, xws li ceramics txhua hnub thiab cov khoom siv huv si.
Frits tam sim no tau siv dav hauv cov khoom siv hluav taws xob nrawm nrawm. Vim tias nws qhov qis qis qis qis qis thiab kub kub kub kub ntau, frit muaj lub luag haujlwm tsis tuaj yeem hloov pauv hauv kev npaj cov khoom siv hluav taws xob hluav taws xob sai sai. Rau cov plooj (porcelain) nrog kub kub kub, cov khoom siv raw yog ib txwm siv los ua lub ntsiab glaze. Txawm hais tias lub frit yog siv rau glaze, tus nqi ntawm cov frit yog heev me me (qhov nyiaj ntawm frit nyob rau hauv glaze yog tsawg tshaj li 30%).
Lub frit glaze tsis muaj hmoov txhuas belongs rau kev ua haujlwm ntawm frit glaze rau ceramics. Nws yog tsim los ntawm cov khoom siv raw hauv qab no los ntawm qhov hnyav: 15-30% ntawm quartz, 30-50% ntawm feldspar, 7-15% borax, 5-15% ntawm boric acid, 3-6% barium carbonate, 6- 6% ntawm stalactite. 12%, zinc oxide 3-6%, strontium carbonate 2-5%, lithium carbonate 2-4%, slaked talc 2-4%, aluminium hydroxide 2-8%. Ua tiav xoom melting ntawm txhuas tuaj yeem ua tau raws li cov neeg xav tau kev noj qab haus huv thiab zoo ceramics.