The raw material of bone china cup is more than 25% natural bone powder and clay. Although the firing temperature is not as high as that of high-temperature porcelain such as blue and white porcelain, about 1200 ℃ is also the plain firing temperature of medium temperature porcelain. Therefore, in general, it is no problem to pour real bone porcelain into 100 ℃ boiling water.
Bone china is a kind of raw material added with natural bovine bone powder, as we just said, but now the domestic bone china market is still a little chaotic. It is likely that you will buy new bone china, that is, high white porcelain with chemical composition, rather than bovine bone powder. Although bone china has certain light transmittance, it is not known whether it can withstand 100 ℃ boiling water because the chemical composition used will produce harmful substances. As for real bone china, it is possible to pour hot water at the initial non-specific low temperature, but it also has a temper during cold and heat treatment. For example, the porcelain is damaged. Generally, drinking fountains use purified water, so the bacterial content is very low, so it's OK even if the water temperature is not 100 ℃.