What is a bone China

Everybody likes the appearance of the bone China, fine workmanship, high quality! But do you know about the bone China how many? Tangshan ceramics co. , LTD. , the small make up to you to introduce it. What is a bone China? Bone China soft porcelain, the use of animal bone, mostly good bone after degreasing rinse and gained high temperature calcination, then after the biscuit firing, glaze firing, twice which adopts many special process. And bone China porcelain is exquisite, smooth, glossy soft glazed, like the feeling of fat like jade. It crystal clear, smooth soft glazed, like the feeling of fat like jade, very elegant. Tangshan bone China is bone charcoal as the main raw material, calcium phosphate in the bone charcoal for flux & other; Phosphate - Clay - Quartz - Feldspar & throughout; The characteristic of tangshan porcelain, bone China is milk white, colour and lustre is natural warm, high whiteness, good transparency, sound knock is ringing, lingering, fine porcelain, porcelain body thin. Bone China is admirable appearance and intrinsic properties, cannot leave it complex and good production technology and strict quality control system, therefore, bone China process complex, difficult and high cost of manufacturing, technology requirements for every operator is quite high. Tangshan makes bone China has far more than other corresponding value of porcelain. Bone China characteristics: 1, ceramic raw materials of high purity precious raw materials high purity, only white cattle bone growth in ranch, free from any metal pollution can be selected. Tangshan, the main raw material of bone China from reserves herbivorous animal bone charcoal, few blank ingredients iron and carbon content, high purity of raw materials and refined, make bone China has pervious to light and flexibility, more hard, not easy fracture, look more beautiful and practical, such as crisp bell. Tangshan bone charcoal used in the bone China, the need for a series of processing to be used. First under the temperature of 900 ~ 1000 ℃ steam cooking degreasing, then calcined at 1100 ~ 1250 ℃ high temperature, the ball mill, grinding again after washing, pickling, in addition to iron, drying the bone powder of tricalcium phosphate content was 98%. Tricalcium phosphate, chemical formula of Ca3 ( PO4) 2, applies tricalcium phosphate ceramics, porcelain, more not only beautiful, but also conducive to health. Tangshan ceramic billet of bone charcoal content is in commonly 42%, enough to make porcelain body of tricalcium phosphate content reached 38%, higher than the standard around 36% of the technical requirements. So this is also to identify bone China the only reliable method. Some products in the raw material to add a small amount of bone char, although appearance with high whiteness, translucent and tire body thin, but tricalcium phosphate content in the porcelain body simply can not meet the standard, so the quality is different from bone China. 2, craft fine bone China in terms of production technology, large is forming difficulties, burning into a narrow range. To this end, the manufacturing process is more complex than ordinary porcelain, strictly. Due to bone porcelain blank of bone charcoal content high, the main ingredients for hydroxy calcium phosphate, bone carbon grinding processing, hydroxy dissolution and alkaline, water and alkali neutralization to assume bone carbon neutral, easy to ensure that mud material formability. Water have to be 2 ~ 3 times repeatedly, until the grinding bone slurry PH near 7 is advisable. Bone China products zero defect, it shall ensure that every link and process accurately. This is no ordinary which is difficult to do. In terms of bone porcelain molding, bone charcoal content is higher, the difficulty of production, the greater the this also is the precious of the bone China. Bone China with more than 42% without plastic bone charcoal, the amount of clay in body formula is lower, than the ordinary ceramic than plastic is poorer, more difficult. Used in production of a variety of methods to increase the plasticity of the billet, such as using the high plasticity clay; Use organic plasticizer; To increase grain fineness. In terms of white porcelain firing, bone China adopt secondary firing process. A firing, the qualified green bloom into sagger in kiln to burn, biscuit firing temperature at 1240 ~ 1255 ℃, after calcined product called & other; Bisque & throughout; ( Or frame) ; Secondary firing, the glaze billet into sagger in glaze kiln roasting, glaze firing temperature at 1100 ~ 1150 ℃, fire after the nonconforming product called & other; White porcelain & throughout; 。 Bone China second sintering process is different from the traditional secondary firing of ceramic. After the biscuit firing of porcelain to be chosen and polished, thermal spraying glaze craft, such as its good solve the problem of the high temperature deformation and glaze gloss. Upon loading, using heat transfer fast thin-wall copying sagger, burn it to buckle, brace etc, can effectively solve the bone porcelain firing range narrow, shrink large and soft collapse deformation problems, but also ensure the bone porcelain of the shape of neat. Bone China with makings fastidious, made careful, strict standards, its neat degrees, whiteness, transparency, thermal stability, etc. All the indicators are demanding. Tangshan ceramics co. , LTD is a professional engaged in bone China ( Bone porcelain) The design, development, production, sales in the integration of bone China manufacturers. We always adhere to the business bottom line, not sales: defective goods, false and inferior product, harmful to human body health of bone China, Bone porcelain) 。