Bone china firing process

Bone china is recognized as the most high-end porcelain tableware in the world. During the firing process, bone china manufacturers have extremely high requirements for its regularity, whiteness, transparency, thermal stability and other physical and chemical indicators. Very high. Due to the exquisite materials, fine production, and strict standards, the value is higher than other types of porcelain. The unique firing process and the addition of bone char, make the impurities in the porcelain clay eliminated, and the bone china appears whiter, finer, transparent, lighter, less flawed, and thinner than ordinary porcelain, and has a special visual cleaning. The sense and strength are higher than ordinary porcelain and twice that of daily-use porcelain. The higher the content of bone meal, the lower the composition of the clay, the easier it is to burn during the production process, and the higher the forming technology is required, which increases the difficulty of firing, so it is more precious.　　Bone porcelain is mainly made of animal bone charcoal. Bone porcelain flower surface decoration and glaze melting are integrated, and it does not contain lead and cadmium which are harmful to the human body. At the same time, because bone china has always been export-oriented, and due to the basic guarantee of European and American societies, the safety requirements for utensils directly used by the human body are very high. Bone china is recognized as the most high-end porcelain in the world, but why some bone china white porcelin dinnerware is cheaper than high white porcelain tableware? Because these very cheap ones are synthetic new bone china, without adding natural beef bone meal, but The natural beef bone meal, which is replaced by synthetic materials developed by Zibo Institute of Ceramics, contains a lot of chemical ingredients and is harmful to the human body. It is called new bone china in the industry. The new bone china is originally a kind of ordinary high white porcelain. The content of calcium oxide in the composition is slightly higher than that of ordinary porcelain. It has a certain degree of light transmission. Bone china. The main differences between it and bone china (bone china) are as follows: 　　 1. The raw materials used are different, more than 40% bone powder is added to bone china, and no bone powder is added to the new bone china.　　 2. The bone china is fired multiple times, and the new bone china is fired once.　　 Third, bone china is softer than new bone china in whiteness, higher transparency, lighter porcelain, and its appearance is much better than that of new bone china.　　 In short, new bone china is not a new variety of bone china, but just borrowed its name, cheap and attractive, so many people are deceived, so we must not be deceived by the word 'new'.　　 1. Put the bone china cup on the bulb (of course you can also face the light), it is top-grade with strong light transmission and soft color.　　 2. The whole body is milky white, the glazed surface is smooth, and the porcelain white porcelin dinnerware is light and thin.　　3. Tap with a porcelain spoon or lay it flat with the palm of your hand open and flick it with your fingers. It is crisp and loud, just like a Hong Zhong.

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