Gilashin da aka rufe, Gilashin al'ada ba tare da wani aiki mai zafi ba, karya sauƙi.
Gilashin ƙarfafa zafi, Sau biyu mafi ƙarfi kamar gilashin da aka shafe, dacewa mai jurewa ga karyewa, Ana amfani da shi ga takamaiman yanayi, kamar wasu gilashin lebur kamar gilashin taso kan ruwa na 3mm ko gilashin gilashi, ba za su iya jure matsanancin iska ba yayin zafin zafi sannan nakasawa ko warpage mai tsanani zai faruwa a kan gilashi, to, yin amfani da ƙarfin zafi zai zama hanya mafi kyau.
Gilashin mai cike da zafi, wanda kuma ake kira gilashin aminci ko gilashin zafi mai zafi, sau huɗu kamar ƙarfi kamar gilashin annealed, ana amfani da shi don aikin wanda ke buƙatar ƙarfin tasiri mai ƙarfi da juriya na thermal, zai karye cikin dice ba tare da tarkace mai kaifi ba.