Zvikamu zvikuru zvegirazi rine ruvara zvakacheneswa quartz jecha uye potassium feldspar, albite, lead oxide (iyo yakakosha chikamu chegirazi), saltpeter (potassium nitrate: KNO3; kutonhora), alkali simbi, alkaline pasi simbi (magnesium chloride: MgCl, melting aid. , kuwedzera kusimba), aruminiyamu oxid ...
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