China Porcelain PK Bone China

The main raw materials of Chinese porcelain are kaolin and porcelain stone. The raw materials of bone china are bone meal and clay. The main chemical components of Chinese porcelain are aluminum oxide and silicon oxide. In addition to these, bone china also contains a calcium phosphate. Calcium phosphate comes from bone meal, which can increase the transmittance of porcelain. Generally, bone china contains 30-50% of bone meal from cattle and sheep. Compared with kaolin porcelain, the advantage of bone china is that it has good light transmittance, looks crystal clear, can be made very thin and light, and has better hand feeling and visual effects. But the weakness of bone china is also obvious. It belongs to soft porcelain and is not as resistant to wear as Chinese porcelain. Moreover, the plasticity is poor, and the blank cannot be drawn manually, and it can only be produced by mold spinning or grouting. In other words, bone china must be mass-produced, and the cost of small individual production is too high. Moreover, bone china is a low-temperature porcelain, and the firing temperature is about 1200 degrees (Chinese white porcelain white porcelin dinnerware is above 1300 degrees). At this temperature, many traditional metal pigments cannot develop color (such as cobalt in blue and white and copper in red in glaze) and can only be decorated with on-glaze decals. The above two points lead to the industrial production of bone china, and it is difficult to create personalized creation. The appearance of bone china made a qualitative leap in the quality of British chinaware ceramic. The industry leader is Royal Doulton, which is just 200th anniversary of its founding this year. Because it is the porcelain used by the British royal family, the title of 'Royal' is added, and the porcelain is also printed with a crown. Doulton's three sub-brands Royal Crown Berby, Minton and Royal Albert are also famous. Japan manufactured bone china in the 1960s, breaking the 200-year monopoly by the British. China produced bone china in the late 1970s, and it is said that the first batch of products were green. Then naturally, China became the largest bone china producer in the world. In addition to Hebei, Shandong, Guangdong, and Jiangsu have large bone china manufacturers.

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