The 3 processes are based on the same raw materials. the difference in manufacture is the drying and forming steps. description of process. raw material of proper proportions and properties to furnish porcelain of the desired quality are weighed from overhead into the weighing car. Porcelain enamel is a glass of a particular chemical composition and physical nature determined for the surface protection of metal.. enamel frit is a form of glass bonded to metal on a molecular level at high temperature. this results in a typical and unique composite material of glass and metal, which combines the positive qualities of both materials. Alibaba offers 2,859 enamel panel products. about 50% of these are other inorganic chemicals, 7% are solar water heaters, and 1% are curtain walls. a wide variety of enamel panel options are available to you, such as plate, grills, and steel plate. Alibaba offers 1,574 raw material for porcelain products. about 0% of these are petroleum additives, 0% are electronics chemicals, and 0% are paper chemicals. a wide variety of raw material for porcelain options are available to you, such as grade standard.