The finished bone china needs three firing processes such as high-temperature biscuit firing, low-temperature glaze firing, and decal firing. The following Weiao Ceramics Editor will give you a detailed introduction to the high-temperature biscuit firing in the bone china firing process.

Why is it called high-temperature biscuit? High-temperature biscuit firing is the process of firing the unglazed bone china blanks at a high temperature of about 1200°C-1280°C (high-quality bone china with high bone powder) to produce porcelain. After high-temperature bisque firing, the porcelain blank can burn off organic matter and impurities, and also make the porcelain blank have sufficient strength. Polishing the bisque porcelain blank, and then glazing and other steps can increase the smoothness of the bone china and fast firing.

my country’s traditional porcelain making is usually low-temperature biscuit firing and high-temperature glaze firing, because the decorative porcelain flower decorations used in my country’s porcelain are made of heavy metal pigments, and the necessary condition for heavy metals to develop color is high temperature. As for the bisque firing first, it is also to strengthen the strength of the porcelain blanks, so that the blanks will not be wetted and spalled due to glazing and flower decorations, and it is convenient for later glazing and flower decorations. Of course, it also improves the rate of authenticity. The rating of my country’s porcelain also involves porcelain blanks. The highest level is to choose the unsintered porcelain blanks without any flaws, and then apply the glaze, flower decorations, etc. to it. The one that comes down perfectly is the highest level; the second is to choose from the porcelain blanks. Smaller defects are inferior products that do not affect their quality after glazing and other operations (the defects cannot be seen). Defective products are made of unfamiliar raw materials (which can be seen by the naked eye, and cannot be completely covered after glazing and flower decorations). Was put into the ranks of defective products.

The unique production process of bone china is inseparable from the complementarity of each step of the process. It can have unique high-temperature biscuit firing and low-temperature glaze firing. Heavy metal pigments, so the required temperature does not require the high temperature of our country’s porcelain, to have such a unique firing process. Bone china with decals for floral decoration is also commonly referred to as overglaze porcelain.