Zopangira ndi kapangidwe ka mankhwala Magulu agalasi a botolo nthawi zambiri amakhala ndi mitundu 7-12 yazinthu zopangira.Pali makamaka mchenga wa quartz, phulusa la soda, miyala yamchere, dolomite, feldspar, borax, lead ndi mankhwala a barium.Kuphatikiza apo, pali zida zothandizira monga clarifiers, colorants, decolora ...
Werengani zambiri