Is bone China good for human body?
Characteristics of Erguci:
1 Beauty of appearance: the porcelain is delicate and transparent, the shape is beautiful and generous, the color surface is moist and bright, and the flower surface is colorful.
High-grade: produced in Britain, it has long been a special porcelain for the British royal family and nobles. It is the only recognized high-grade porcelain in the world at present, which has dual values of use and art, is a symbol of rights and status, and is known as the king of porcelain.
Process: secondary firing, complicated process, only produced in Britain, China, Japan, Germany, Russia and Thailand.
Selection of three-bone porcelain;
1 Cover the cup on the light bulb (of course, it can also face the light). The top grade is strong in light transmission and soft in color.
The whole body is milky white, the glaze is smooth and the thin porcelain is of high quality.
Beating with a porcelain spoon or flicking with your fingers is crisp and loud, just like Hong Zhong.
Four bone porcelain maintenance:
1. Be sure to wash by hand, and don't use the dishwasher. If you really don't want to wash by hand, choose a dishwasher with "porcelain crystal" washing function.
2. Phnom Penh tableware should not be put into the microwave oven to avoid corrosion.
3. The washing PH must be between11-11.5.
4. When cleaning with clean water, the water temperature should not exceed 80 degrees Celsius.
5. Don't directly immerse the hot cup in cold water, so as not to damage the porcelain due to the rapid temperature change.
6. If there are scratches, you can polish them with toothpaste.
7. If there are tea stains, you can wash them with lemon juice or vinegar.
8. It is best not to use it when there is sudden fever to avoid bursting.
9. Don't burn directly with an open flame.
The so-called bone China was invented by the British in 1794. It is named after adding the ashes of herbivores such as cattle and sheep (preferably bovine bone powder) to its clay, and it is an environmentally friendly green consumer product.
The formation of bone China mainly depends on silica, alumina and calcium oxide. The higher the content of calcium oxide, the better the color. In nature, there are not many sources of calcium oxide, so animal bone meal is chosen as the source of calcium oxide.
The color of bone China is a natural milky white unique to natural bone powder. Generally speaking, porcelain containing 25% bone powder in raw materials can be called bone China, and internationally recognized bone powder content is above 40%. The best bone China generally contains 5 1% of high-quality bovine bone powder. Among them, bone powder accounts for more than 40%, and the color of the appliance is milky white, which belongs to high-grade bone porcelain. Only a few domestic manufacturers in Tangshan and Zibo produce and export.
After grouting, molding, gypsum mold dehydration, one-time firing, glaze firing, decal paper baking and other processes, it has become a porcelain with high whiteness, high transparency and fine porcelain quality. In the firing process of bone China, the requirements for its regularity, whiteness, transparency, thermal stability and other physical and chemical indicators are extremely high, resulting in a high rejection rate. Because of its exquisite materials, fine production and strict standards, its value is higher than other porcelain types. The unique firing process and the addition of bone carbon have eliminated the impurities in porcelain mud. Bone porcelain is whiter, more delicate, transparent, lighter, with fewer defects and thinner than ordinary porcelain. It has a special sense of cleanliness visually, and its strength is higher than that of ordinary porcelain and twice that of daily-use porcelain. The higher the content of bone powder, the lower the clay content, and the easier it is to burn and crack in the production process. It requires higher technology in molding, which increases the difficulty of firing, so it is more precious.
At present, bone China is generally a chemical formula, because there are not so many animal bone powders available.
Someone has done such an experiment, putting four bone China cups under a Rolls-Royce wheel. These four crystal cups are enough to support the weight of the RV!
High-grade porcelain includes bone porcelain, shell porcelain and pearl china. Because of the high cost of shell porcelain and pearl china, there is almost no industrial production, so bone porcelain is recognized as the most high-grade porcelain in the world.
Many people think that blue and white are exquisite and have bone China. In fact, the blue and white exquisite is very easy to burn out in the firing process, because it is carved holes in the blank as raw materials for bone China.
The source of bone China:
The English name of Bone China is "bone China", which is a porcelain with high whiteness, good transparency, fine porcelain and smooth glaze made by mixing animal ashes into ceramic raw materials. It is known as "as thin as paper, as white as jade, as bright as a mirror and as bright as a parallel".
Bone China was first produced in England. At first, its basic formula was six parts of ashes and four parts of porcelain stone. Later, it gradually developed into fifty parts of ashes, twenty-five parts of porcelain stone and twenty-five parts of clay. Until today, it has been considered as the standard formula in Britain.
Bone China is considered to be the highest grade porcelain variety in the world. According to international standards, bone China contains more than 25% of the ashes of herbivores, which is an environmentally friendly green consumer product. Compared with ordinary ceramics, the unique firing process and bone carbon content make bone China appear whiter, more delicate, more transparent and lighter. Ceramics originated in China, but bone China originated in England. It used to be a long-term special porcelain for the British royal family, and it was beautiful. Even now, bone China is a symbol of the owner's identity and status. Because cow bone powder can increase the hardness and transparency of porcelain, bone porcelain can be thinner than ordinary porcelain. Put the cup in a bright place to observe. Bone China products with fine composition, light transmission and no impurities are the first choice. Bone China, like ceramics, is graded, usually depending on the texture of the material, manufacturing technology and painting design. The higher the number of bone China, the more difficult it is to make and the more expensive the finished product is.
Characteristics of Erguci:
1 Beauty of appearance: Porcelain is delicate and transparent, with beautiful and elegant shape, jade-like color and colorful flowers.
High-grade: produced in Britain, it has long been a special porcelain for the British royal family and nobles. It is the only recognized high-grade porcelain in the world at present, which has dual values of use and art, is a symbol of rights and status, and is known as the king of porcelain.
3. Health products: Bone charcoal from animals is mainly used to make bone China. The floral decoration and glaze of bone China are integrated, and lead and cadmium are not harmful to human body. It can be called a real "celadon", and long-term use is beneficial to human health.
Fine workmanship: secondary firing, complicated process, only produced in Britain, China, Japan, Germany, Russia and Thailand. Bone China is light, fine and hard (twice as hard as domestic porcelain), and it is not easy to wear and break. It does not crack once after hydrothermal exchange at 180℃ and 20℃, and its water absorption is less than 0.003%. & lt/CA & gt；