Anyi amfani da kyawon tsayuwa, babban kayan sa shine yashi quartz da alkali da sauran kayan taimako.Bayan ya narke sama da 1200 ° C babban zafin jiki, ana samar da shi ta sifofi daban-daban ta hanyar gyare-gyaren zafin jiki mai girma bisa ga siffar mold.Mara guba da wari.Ya dace da kayan kwalliya, abinci, ...
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