The two-enamelling and two-fired powder method is one of the processes of the enamelling system. This means that the enamel base is washed, dried, powder-coated and enamelled only once. The wet colored enamel (white, brown, gold) is then sprayed on the fired ground coat, dried and then fired. It is still a two-enamelling and two-firing process, but it uses dry powder enamelling technology.

This process includes: cleaning steel parts → spraying powder ground coat → enamel firing ground coat → ball milling colored cover coat → spraying enamel on the ground coat → drying and enamelling colored cover coat

The main advantage of the two-enamelling and two-firing powder method is that the final enamel layer is fired with a thinner thickness, with a typical size of 4-5 μm, which can make the porcelain layer have a high surface quality and lower production costs. This powder enamel process system is often used to manufacture parts such as door linings, furnace floors, and oven floors.

There are different types of enamelling systems, but there are several enamelling processes that can be used for a given enamelled article or enameled part. The choice of enamelling process must be determined according to the structural characteristics and use properties of products and parts. For example, the enamel steel plate is a standard part of 4~5cm, and the normal size of 5~6cm is reached after the ground coat is applied, and then the standard color enamel of 0.5mm is applied. These conditions are the most effective for the production of stove parts, using the dry enamelling process . On the other hand, workshops also have corresponding requirements. Different enamel processes prepare different types and sizes of parts. These parts are most effective when using the pickling enamel process if they have a rough surface. Therefore, the selection of a suitable enamelling system depends on the specific needs.