Ufa wowuma, womwe ndi wokutidwa ndi al2o3 & siio2 ndi wapadera wapadera
kuthandizidwa kuti akhale ndi zinthu zabwino zonse zamisala komanso zida zabwino kwambiri. Zogulitsazi zikuwonetsa kuyera kwabwino, kukwera kwakukulu kwa gloss, mphamvu yayikulu, yolumikizira mphamvu, kuyamwa kwa Chalk, kuyamwa kwamphamvu, kunyowa kochepa
zosavuta kubalalika m'njira zosiyanasiyana.