Yakagadzirwa uchishandisa mold, yayo huru mbishi jecha requartz uye alkali uye zvimwe zvekubatsira.Mushure mekunyunguduka pamusoro pe1200 ° C tembiricha yakakwira, inogadzirwa mumhando dzakasiyana nekuumbwa kwekushisa kwepamusoro zvichienderana nechimiro che mold.Kwete-chepfu uye isinganhuhwi.Inokodzera zvizorwa, chikafu, ...
Verenga zvimwe