The production process and history of bone china

The production process and history of bone china Bone china is the only porcelain variety invented by Westerners in the world, and it has been given a high value appraisal. originated in China, but bone china was created in the United Kingdom. It has long been a special porcelain white porcelin dinnerware for the British royal family and is uniquely magnificent. Right now, bone china is also a symbol of the status and status of the owner. In fact, the appearance of bone china was purely accidental, strictly speaking, it was the unexpected result of a less successful imitation. The 'Cambridge History of China' describes the invention of bone china as follows: Ancient Chinese ceramics are of extremely high value in the West, and their export history can even be traced back two thousand years ago. In Europe, the work of imitating chinaware ceramic has never been interrupted, but the real breakthrough is also attributed to the development of the Venetian glass industry. Today, people know that ceramics are composed of three parts: an enamel layer, a bonding layer, and an inner clay layer. One of the most difficult to imitate is the enamel layer. In the 15th century, the Venetians invented lead glass. After that, a lot of attempts have been made in this field. People have found that the enamel layer of ceramics is somewhat similar to glass. About the seventeenth century, the thin porcelain tableware of Chinese porcelain tableware was introduced to Europe. This is a shocking invention. The Chinese history book 'Tao Ji' says that this kind of porcelain: 'Thin as paper, as white as jade, as bright as a mirror, and as sound as a mirror. Chime'. The European saying is: 'Thinner than paper, whiter than milk, and more transparent than glass' (literal translation). This kind of porcelain is invaluable in Europe. A piece of porcelain can even be exchanged for an army. What's even more amazing is that this kind of porcelain can even be made into lamps, but it has a more fantastic effect than glass lamps. In order to obtain the effect of 'more transparent than glassBone meal can obtain calcium oxide after high temperature, which is a very mature technique in glass process. In order to obtain the milky white of the thin porcelain, he added some aluminum powder. Today's technology tells us that calcium oxide is one of the most important fluxes in glass manufacturing. It can effectively lower the softening temperature of silica and make it easier to form glass-like substances. Alumina is a commonly used opacifying agent, it can even make the glass appear less transparent milky white. Soon, a European ceramic was invented. Although it is still difficult to reach the thickness of about 1mm-2mm of thin porcelain, and the color tone is slightly reddish, it is impossible to realize the high white color. After all, this is the only porcelain invented in the West. Its appearance is revolutionary. of. Because this kind of ceramic has a large amount of animal bone powder added in the firing, it is called 'Bone ChinaDue to the needs of industrialization and the development of science and technology, people no longer put in animal bone meal, but used a compound formula of calcium oxide and aluminum oxide, making bone china available to more people. However, the production of a very small number of high-end bone china still uses some raw materials such as bone meal, and the value is generally hundreds of pounds or even higher. Nowadays, the bone china cup is placed in a bright place for observation, and bone china products with fine ingredients, light transmission and no impurities are the first choice. Bone china is graded like ceramics, and it usually depends on the texture of the material, the manufacturing technology and the painted design. The higher the grade of bone china, the more difficult it is to produce, and the more expensive the finished product.
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