Alibaba offers 216 enamel cover hot plate products. about 36% of these are pans, 8% are dishes & plates, and 3% are ovens. a wide variety of enamel cover hot plate options are available to you, such as cb, ce, and ce / eu. Enamels for metal are fired either in a pre-heated furnace (kiln) or a hand held torch. if firing in a furnace, the temperature should be between 1450 and 1500 degrees f. whether you set your furnace at 1450 or 1500 depends on how accurate your pyrometer reading is; how long it takes you to open the door,... Reduce bubbles on cover coat. to ensure the smooth surface of enamel products. 5, with suitable expansion coefficient similar as steel plate. steel plate ground coat frit usage introduction: steel plate ground coat frit is mainly used in low carbon steel plate, with very good adhesion and wide firing temperature range. This results in a typical and unique composite material of glass and metal, which combines the positive qualities of both materials. our main products of enamel frits including ground coat, cover coat, transparent frit , matt enamel, direct on black frits and various cast-iron frits. 4.