Ntchito ya strontium carbonate mu glaze: frit ndikusungunula zinthu zopangira kapena kukhala thupi lagalasi, lomwe ndi chinthu chogwiritsidwa ntchito kwambiri popanga glaze ya ceramic. Mukasungunula kale kukhala flux, mpweya wambiri umatha kuchotsedwa mu glaze, motero kuchepetsa kupanga thovu ndi mabowo ang'onoang'ono pamwamba pa glaze ya ceramic. Izi ndizofunikira kwambiri pazinthu za ceramic zomwe zimakhala ndi kutentha kwakukulu komanso nthawi yochepa yozimitsira moto, monga ceramics za tsiku ndi tsiku ndi ceramics zaukhondo.
Ma frits pakadali pano amagwiritsidwa ntchito kwambiri mu ma glaze a mbiya opangidwa mwachangu. Chifukwa cha kutentha kochepa koyambira kusungunuka komanso kutentha kwakukulu, frit ili ndi gawo losasinthika pakukonzekera zinthu za ceramic zomangidwa mwachangu. Pa porcelain yokhala ndi kutentha kwakukulu koyaka, zinthu zopangira nthawi zonse zimagwiritsidwa ntchito ngati glaze yayikulu. Ngakhale frit ikugwiritsidwa ntchito pa glaze, kuchuluka kwa frit kumakhala kochepa kwambiri (kuchuluka kwa frit mu glaze ndi kochepera 30%).
Glaze yopanda lead ndi gawo laukadaulo wa frit glaze ya zoumbaumba. Imapangidwa ndi zinthu zotsatirazi polemera: 15-30% ya quartz, 30-50% ya feldspar, 7-15% ya borax, 5-15% ya boric acid, 3-6% ya barium carbonate, 6-6% ya stalactite. 12%, zinc oxide 3-6%, strontium carbonate 2-5%, lithium carbonate 2-4%, slaked talc 2-4%, aluminiyamu hydroxide 2-8%. Kukwaniritsa kusungunuka konse kwa lead kumatha kukwaniritsa zosowa za anthu za zoumbaumba zathanzi komanso zapamwamba.