Bone meal, the raw material of bone china

A large part of the reason why is called bone china is because it adds animal bone meal to its raw materials, so bone china was called bone china when it was first invented. Later changed its name to bone china. Bone powder is one of the main raw materials of ceramic tableware. The content of bone powder in ordinary bone china accounts for more than 25% of the whole body. The content of bone powder in high-quality bone china accounts for more of the whole body, which is between 45% and 51%. In the meantime, the accident is not an accident, and is it not surprised? Bone meal also plays a great role in bone china. Because its content in bone china is different, the bone china made is also different. One thing is very important. Bone meal is not what you can add as much as you want, instead of adding 45%~51% bone meal directly to the body, it can be fired into high-quality bone china. The higher the content of bone powder in the body of bone china, the more difficult the process required. That is because the body with high content of bone powder 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 a factor in the relatively high price of high-quality bone china. The main raw material of bone china products is bone meal. It can be said that bone meal is very important for bone china. As we all know, the content of bone powder in bone china is very important (bone china with different content and specifications is a world of difference, the most obvious is that the price gap is very large), in fact, the quality of bone meal is also very important. The quality of the bone powder added to the bone china and the content of the bone powder in the body will have a great impact on the color, transparency, hardness and firing temperature of the bone china. Generally, the bone meal used in bone china is obtained by cooking and degreasing the bones of herbivores such as pigs, sheep, cattle, and then air-drying, calcining and grinding. The general sequence of bone china process includes grouting, mould pressing embryo, gypsum mold dehydration, and initial firing, glazing firing, decal baking and other processes to make the primary bone china final product. The bone china body with low bone powder content requires a lower temperature during initial firing, because when the bone powder content is low, it acts as a co-solvent by itself, so the firing temperature of bone china is not high, and the process is compared with high-quality bone china. It's a lot simpler. So let's talk about the kind of bone meal that is better to add to bone china. Britain is the birthplace of bone china. The British believe that 2 to 4 years old calf bone is the best raw material for bone powder in bone china. After experiments, they found that bone china with bovine bone meal added to the body requires a higher temperature (about 1220 degrees Celsius) during the firing process. The temperature required for the firing of the body with pig bone powder is the second, and the temperature required for the firing of the body with sheep bone meal Worst. Moreover, bone china made by adding beef bone meal has better color (whiteness), transparency and hardness than bone china made from pork bone meal and sheep bone meal. with 45%~51% beef bone meal must be high-quality bone china. To check whether the beef bone meal is used in bone china, you can rub your fingers on the edge of the appliance with water. If it makes a squeak, it means it is.

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