What is bone china? Is it ceramic made of bones?

Bone china is a kind of porcelain white porcelin dinnerware invented by the British. It is named bone china because its raw materials are mixed with herbivore bone meal. As the favorite porcelain of the British royal family, it is considered to be a high-end porcelain species. The formation of bone china mainly relies on silicon oxide, aluminum oxide and calcium oxide. The higher the content of calcium oxide, the better the color. In nature, there are not many sources of calcium oxide, so animal bone meal is chosen as the source of calcium oxide. Bone china is made from herbivore bone meal (bone meal is best) and pottery that is glaze at high and low temperature twice. Generally speaking, raw materials with more than 25% bone meal can be called bone china. High-quality bone china is milky white, with high regularity, good overall light transmission, fewer defects, and low water absorption. High-quality bone china daily-use wares are fired twice at high temperature and low-temperature glaze firing to become porcelain with delicate porcelain and warm and smooth glazed surface. They have also become common utensils on people's daily dining tables and tea seats. At present, the ceramic market is also full of some fake and inferior bone china. How to distinguish between them, here are some tips for you: First, look at the color and luster. High-quality bone china is creamy white, ordinary bone china is creamy yellow (the creamy yellow of bone), and fake bone china is dazzling bright white or dark yellow. 2. Light transmittance. High-quality bone china is transparent as a whole, illuminated by light, the whole vessel is translucent and translucent, and the light passing through is white light, which can be used as a lampshade; while fake bone china, part of it is transparent, part of it is not transparent, and cast The passing light turns yellow. In the case of ordinary bone china, it is partly transparent and part opaque, and the transparent part is transparent. The color of the passing light is white, and it will not yellow or change color. Third, listen to the sound. Flick (or tap) the utensil with your fingers. If it is high-quality bone china, the sound is similar to the bell ringing and the echo is melodious; if it is fake bone china, the sound is not easy to hear and crisp, and there is basically no echo. High-quality bone china is environmentally friendly and does not contain heavy metals such as lead and cadmium. New bone china uses chemically synthesized raw materials instead of bone powder. Although it has a certain light transmittance, it is not bone china.

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