A large part of the reason why bone china is called bone china is that it adds animal bone powder to the material, so bone china was called bone china when it was first discovered. Later changed its name to bone china. Bone powder is one of the main raw materials of bone china cups. In general bone china products, the bone powder content accounts for more than 25% of the green body. The bone powder content of high-quality bone china cups accounts for a larger proportion in the green body, ranging from 45% to 51%. %between.
Bone meal is also very useful in bone china. Due to its different content in bone china, the bone china presented is also different. One thing is very important, you can add as much bone powder as you want, not simply add 45%~51% bone powder to the green body to make high-quality bone china. The higher the content of bone powder in the bone china body, the more difficult the process required. This is because the body with high bone powder content is easy to burst during the firing process, so bone powder is not what you want to add, you can add it if you want. Of course, this is also one of the reasons why high-quality bone china is relatively expensive.
The main material of bone china products is bone powder. It can be said that bone powder is very important for bone china. As we all know, the content of bone powder in bone china is very important, but the quality of bone powder is also very important. The quality of bone powder added to bone china and the content of bone powder in the green body have a great influence on the luster, transparency, firmness and firing temperature of bone china. Generally, the bone meal used in bone china is obtained from the bones of herbivores such as pigs, sheep, and cattle, which are first steamed and degreased, then air-dried, calcined, and ground. The bone china process generally includes grouting, mold pressing, dehydration of plaster mold, initial firing, glaze firing, decal paper baking and other processes to produce the initial bone china product. Bone china bodies with less bone powder content require a lower temperature during the initial firing, because when the bone powder content is low, it itself acts as a solvent, so the firing temperature of bone china is not high, and the process is compared to high-quality bone china. It’s much simpler to say.
So let’s talk about which kind of bone meal is better to add to bone china? The UK is the origin of bone china, and the British think that 2-4 year old calf bones are very good as raw materials for bone china. Through experiments, they found that the bone china with bovine bone powder in the green body needs a higher temperature (about 1220 degrees Celsius) during the firing process, the temperature required for firing the green body with pig bone powder is second, and the bone china with sheep bone powder very bad. Moreover, the bone china made from bovine bone meal is better than the bone china made from pig bone meal and sheep bone meal in terms of luster (whiteness), transparency and hardness.
A bone china cup with 45%~51% bovine bone powder must be a high-quality bone china cup. To check whether the bone china cup is made of bovine bone meal, you can use your fingers to rub the edge of the utensil with water. If there is a creaking sound, the analysis is good.
Post time: Jun-01-2023