Double firing

Double firing - the double firing technique in the porcelain industry

Porcelain is an end product that only grows into a solid state when raw materials are fused together under great heat. This process of porcelain production is called porcelain firing, which can take place in different furnaces and production stages. We have described the variety and different possibilities for this in detail in our section about kilns and firing.

Unlike mono firing, the vast majority of European manufacturers use the dual firing process. This means that porcelain is fired twice. Each firing stage has its own function. In the first firing, the so-called glow firing, the porcelain is heated to approximately 800 - 900 °C and burns up. Sintering takes place.

After cooling, it is returned to the machining process. Unwanted residues, seams, bonnets, etc. are removed, cleaned and polished, floor marks are applied and product-specific finishing processes are carried out. This is followed by the glaze. Once the body is in the desired condition, it is subjected to a further firing stage, the so-called glaze firing.