What's the difference between China porcelain and foreign porcelain?

Jingdezhen is a typical traditional porcelain in China. The porcelain body of Jingdezhen porcelain is sericite porcelain with porcelain stone and kaolin as the basic formula. Its porcelain glaze is calcium glaze containing only a small amount of feldspar. The firing temperature in Qing dynasty was about 1300 (1300 20 c c? ), the porcelain tire and the porcelain glaze are fired at the same time, that is, the firing temperature of the tire and the firing temperature of the glaze are 1300 degrees.

The glaze of China traditional porcelain belongs to insoluble glaze and high temperature glaze, and does not contain lead. Glaze has high grinding hardness and is not easy to be scratched by metal and porcelain.

Traditional porcelain has no concept of hard porcelain and soft porcelain.

Second, European porcelain.

1, from History of European Porcelain

European countries try to make porcelain with only one goal: to imitate the porcelain of eastern countries. Because China's porcelain production is confidential, the technology used by it has not been known to European potters for a long time, and European potters must pass their own experiments on porcelain technology. As a result, several different forms of materials have been made, none of which are the same as those used in porcelain tires.

There are two kinds of European porcelain bodies: one is hard porcelain with a high proportion of kaolinite in the formula containing kaolinite, feldspar and silica; The other is soft porcelain with little or no kaolinite content, and its main component is timely. These two forms of European ceramics are also fired at different temperatures, and the dividing line is1350 C. Most hard ceramics are fired at1380 ~1460 C, and soft ceramics are fired at1100 ~/kloc.

In the whole process of porcelain manufacturing, firing is the most important stage, and it is indeed the core of ceramic art, because porcelain can obtain high-quality appearance after repeated firing. The green body is pre-sintered at about 950℃ to harden it, thus producing a porous and unglazed carcass. During the pre-firing, the utensils are placed in a fire-resistant sagger to protect them from dirt and to protect them from direct contact with hot flue gas. If underglaze decoration is expected, this kind of porcelain should be painted now, so it should be cleaned and trimmed, dipped in the prepared glaze, and then fired at a second high temperature. Its temperature is determined by the content of kaolinite and feldspar in the tire and glaze, but it is said that it is generally between 1370 ~ 1460℃. It is necessary to prevent iron oxidation in the tire, because it will lead to yellowing of the porcelain blank and destroy the precious white color of the porcelain. It is necessary to reduce the oxygen content in the kiln to prevent oxidation during firing in the reducing flame (that is, between1100 C-1300 C). At a suitable temperature, the fetal glaze is firmly fused together, and the glaze surface forms a transparent and shiny glassy surface. What comes out of the kiln is porcelain products.

Reheating is about decoration. The color of underglaze color used is affected by high temperature, and the range of pigments is almost limited to cobalt blue, chrome green, uranium black and copper red.