Nws lub ntsiab yog silica, alumina, calcium oxide, boron oxide, magnesium oxide, sodium oxide, thiab lwm yam, raws li cov ntsiab lus alkali ntawm lub khob, tuaj yeem faib ua alkali tsis pub iav fiber ntau (sodium oxide 0% rau 2%, teej tug rau iav Borosilicate iav, nruab nrab alkali iav fiber ntau (8% rau 12% sodium oxide, sodium lossis calcium silicate iav muaj boron lossis boron) thiab siab alkali iav fiber (ntau dua 13% sodium oxide, sodium calcium (Silicate iav).
