How to distinguish bone porcelain and kaolin porcelain?
(Bone China): also known as referred to as bone china, Bone China, production began in England, the basic process is based on animal bone char, clay, feldspar and quartz as raw materials, a kind of porcelain biscuiting after high temperature and low temperature glaze firing two times. The two basic features of Bone China are the essential basis for the distinction between Bone China and other porcelains. Feature: char content above 36% (national standard); two characteristics: after two firing into (biscuiting, glaze). According to the British standard set by China, with thirty percent from animal bones of calcium phosphate, and the finished product has light transmittance, have called china. Bone porcelain because of its unique shape, simple and neat, white and delicate texture, has long been the countries aristocracy with porcelain, is recognized as the world's only high-grade porcelain.
Kaolin is a kind of clay and clay rock mainly composed of kaolinite group clay minerals. Named after kaolin village, Jingdezhen, Jiangxi province. The quality of pure kaolin is white, fine and soft, and it has good plasticity and fire resistance. The mineral composition is mainly composed of mineral kaolinite, halloysite, illite, illite, montmorillonite and quartz, feldspar etc.. Kaolin has a wide range of uses, mainly used in papermaking, ceramics and refractory materials. Fired ceramic is called "kaolin porcelain"".
Voice: the two grade bone china products gently collided, like sweet voice like the sound of wind chimes, and there will be a few seconds of echo, and other kinds of no, also does not have the characteristics of kaolin porcelain.
Permeability: causes of bone porcelain production formula itself has an important external characteristic is the permeability, but this feature is not China's proprietary, on the market of shell porcelain and white porcelain (kaolin porcelain), pearl porcelain as long as do some thin, but also the existence of permeability, permeability and bone but they are different, for the customer, the bone china into a light bulb to see, bone meal with high content of Fine Bone China is wholly transparent, low content of bone and other bone china porcelain that has the obvious difference in the permeability effect. Moreover, the porcelain of the same thickness, the permeability of Bone China is much higher than similar porcelain.
Color: China for porcelain powder containing the reason itself has a natural milk white, in other words, with a little yellow, this is a feature of any other kinds are unable to copy out. Kaolin porcelain is pure white.
