4 characteristics of bone china and 3 identification methods

The 4 characteristics of bone china and 3 methods of identification What is bone china? Bone china (Bone china): referred to as bone china, also known as bone china. The production started at the end of 1821 in England. The proportion of bone ashes and porcelain stone was “standardized”. The porcelain produced from the blank is the best product. The basic craft is a kind of porcelain tableware made from animal bone charcoal, clay, feldspar and quartz as basic raw materials, after high-temperature biscuit firing and low-temperature glaze firing twice. The two basic characteristics of bone china are the essential basis for distinguishing bone china from other porcelains. Feature 1: The bone char content is more than 36% (national standard). Feature 2: After the second firing (bisque fired, glazed fired), according to the bone china standard set by the United Kingdom, it contains 30% of the phosphoric acid from animal bones Tricalcium, and the finished product has light transmittance, it can be called bone china. The American standard is at least 25%. Bone china is made of exquisite materials, finely produced, and strict standards. Its regularity, whiteness, transparency, thermal stability and other indicators are extremely demanding. Due to the complicated process of high-grade bone china, it is more difficult to produce than ordinary daily-use porcelain, and its production technology is difficult to popularize. Because of its unique shape, concise and lively, white and delicate texture, bone china has long been used by nobles in various countries, and it is the only high-end porcelain tableware type recognized in the world. Main features of bone china: 1. Beautiful appearance: fine and transparent porcelain, beautiful and elegant shape, moist and bright color surface, and colorful flower surface. 2. High-grade: Produced in Britain, it has long been a special porcelain white porcelin dinnerware for the royal family and aristocracy in the UK, and is known as the king of porcelain. 3. Fine craftsmanship: secondary firing, complicated craftsmanship, only produced in Britain, China, Korea, Japan, Germany, Russia, and Thailand. 4. Difficult to process: During the firing process, it requires extremely high requirements for its regularity, whiteness, transparency, thermal stability and other physical and chemical indicators. How to identify bone china: 1. Color: Bone china has a natural milky white color due to its powder content. In popular words, it has a little bit of yellow. This feature cannot be imitated by any other kind of porcelain. of. 2. Permeability: The reason for the formulation of bone china itself is the permeability. High-grade bone china with high bone powder content is overall permeable, and bone china with low bone powder content is in communication with other types of porcelain. There is a clear difference in penetration effect. 3. Sound: When two high-grade bone china products collide gently, the sound is as sweet as the sound of a wind chime, and there will be a few seconds of echo, while other porcelains basically do not.
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