Doorka strontium carbonate ee glaze-ka: frit waa in hore loo dhalaaliyo walxaha ceeriin ama la noqdo jir galaas ah, kaas oo ah walxo ceeriin ah oo caadi ahaan loo isticmaalo glaze-ka dhoobada ah. Marka hore loo dhalaaliyo qulqulka, inta badan gaaska waxaa laga saari karaa walxaha ceeriin ee glaze-ka, taasoo yaraynaysa soo saarista xumbo iyo godad yaryar oo ku yaal dusha sare ee glaze-ka dhoobada ah. Tani waxay si gaar ah muhiim ugu tahay alaabada dhoobada ah ee leh heerkul sare oo dab-shid ah iyo wareeg dab-shid gaaban, sida dhoobada maalinlaha ah iyo dhoobada nadaafadda.
Frits hadda si weyn ayaa loogu isticmaalaa muraayadaha dhoobada ee si degdeg ah loo shido. Sababtoo ah heerkulkeeda dhalaalka bilowga ah oo hooseeya iyo heerkulka gubashada oo weyn, frit wuxuu leeyahay door aan la beddeli karin oo ku saabsan diyaarinta alaabada dhoobada ee dhismaha ee si degdeg ah loo shido. Foornada leh heerkulka gubashada oo sarreeya, walxaha cayriin waxaa had iyo jeer loo isticmaalaa glaze-ka ugu weyn. Xitaa haddii frit-ka loo isticmaalo glaze-ka, xaddiga frit-ka aad buu u yar yahay (xaddiga frit-ka ee ku jira glaze-ka waa ka yar yahay 30%.).
Glaze-ka aan rasaasta lahayn wuxuu ka tirsan yahay qaybta farsamada ee frit glaze ee dhoobada. Waxaa laga sameeyay walxaha ceeriin ee soo socda miisaan ahaan: 15-30% quartz, 30-50% feldspar, 7-15% borax, 5-15% boric acid, 3-6% barium carbonate, 6-6% stalactite. 12%, zinc oxide 3-6%, strontium carbonate 2-5%, lithium carbonate 2-4%, talc la jarjaray 2-4%, aluminium hydroxide 2-8%. Gaaritaanka eber dhalaalka rasaasta waxay si buuxda u dabooli kartaa baahiyaha dadka ee dhoobada caafimaadka leh iyo tayada sare leh.