The production process of bone china

With the improvement of people's living standards, bone china, as a world-recognized high-end porcelain category, is becoming more and more popular, and its market scale is gradually expanding. Although people have a strong pursuit of bone china, they don't know much about the production process of bone china. Let's take a look at the production process of bone china. In nature, there are few sources of calcium oxide, so people choose animal bone meal as the source of calcium oxide. Generally speaking, adding 25% bone meal to the raw materials can be called bone china, but the best quality bone china is now recognized as the best quality bone china with 45%-51% bone meal content, and cattle bone is the best. Raw materials: High-quality bone china is made by adding a large amount of beef bone powder with less impurities to the raw materials with feldspar and precious stone clay as the main raw materials. Forming: bone china uses exquisite materials, fine production, and strict standards. The completion of its regularity, whiteness, transparency, thermal stability and other indicators depends on its raw materials silicon oxide, aluminum oxide and calcium oxide. Among them, calcium oxide That is, the higher the content of animal bone meal, the better the color. When the bone meal content reaches a certain proportion, the quality of porcelain is greatly improved, which is mainly reflected in the gloss and moistness of the utensils. However, if the content exceeds a certain ratio, the composition of the clay will be relatively reduced, the porcelain will become too soft, and it will be easier to burn during the production process. Molding requires higher technology, which increases the difficulty of firing, so it is more precious. Firing: (1) The formed bone china is sintered at the highest temperature of 1250℃. During the sintering process, the shrinkage of bone china is very large, so the finished product will shrink by 20% after kiln firing (generally porcelain white porcelin dinnerware shrinks by 7%). Therefore, the shape is easy to deform, and plates, bowls, etc. must be placed on the special Kuang bowls for long-term cooking. (2) Carry out shape bending and size inspection afterwards. After grinding the surface, spray the glaze with a sprayer and burn the glaze at 1150℃ in the kiln. Coloring: The general method of coloring is to paste transfer paper on a white finished product and burn it at 820°C. Inspection: All trips have been strictly inspected, and qualified products will be sent to the factory on the next trip. Bone china not only has a beautiful and exquisite appearance, but also is more beneficial to people's health than ordinary porcelain white porcelin dinnerware. products will inevitably be corroded by acid and alkali in daily use, and metal overflow will affect human health over time. The bone china does not contain lead and cadmium. The in-glaze color underglaze bone china is not only free of lead and cadmium, but also the flower surface is not easy to wear and fall off. In addition to being used as general tableware, it is also suitable for microwave ovens. It is a well-deserved green Healthy chinaware ceramic.
Porcelain Dish Set catering dishware processes have been widely used to produce Ceramic Dinnerware Sets such as Porcelain Dish Set, Ceramic Dinnerware Sets, and Porcelain Dish Set etc.
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