Ko glassware inowanzo kupiswa mu muffle vira?

Iyo yekudziya inogona kuiswa pane denderedzwa diki yemagetsi choto chakagadzirwa nemishonga yekudzivirira waya, kwete mune yevhu yemoto. Iyo tembiricha yeiyo muffle vira inenge yakati rebei. Pasi pekupisa kwakanyanya kwenguva yakareba, girazi rinozvipira, zvinyoro nyoro, uye deform. Kana mudziyo wegirazi une zviyero, chiyero chichava chisina kukodzera.