High-grade porcelain identification method:
1, pay attention to porcelain fetal quality: the fetal quality must be loose, when knocking, the sound must be crisp. When buying antique porcelain, it must be judged by age to determine the thickness of the carcass. For example, the fixed kiln is divided into Nanding and Beiding, the carcass of Beiding must be thick, and the carcass of Nanding is thin. It is best to carry a flashlight when buying porcelain. When identifying, don't look outside (from the general business practice), but take photos from the outside, then observe the projection inside the porcelain, touch the porcelain by hand, if you see the shadow inside is moving with your hand, Prove that the porcelain is thin.
2, glaze color: glaze must be accurate and uniform. Accurately speaking, the glaze of porcelain made after the Republic of China was white, and the glaze of porcelain produced in the Qing Dynasty was bean blue. This should be noted when buying antique porcelain.
3, the style of painting: good style. In particular, when buying large-sized porcelain, pay attention to distinguish between hand-painted and decals. The applique pattern is dull and the lines are dead. The small-shaped blue-and-white porcelain can be used to touch the edges and corners, which is caused by the glue used in the decals. The edge pattern of porcelain often uses decals, and sometimes seams may appear at the joint of the decals, or the patterns of the left and right portions may be uneven.
4, shape: unique as well.
Low-grade large-scale porcelain identification method:
1. Porcelain carcass: The carcass should be even, and there should be no collapse.
2, glaze color, style: as long as you master the techniques of identifying decals and hand-painted. Even when purchasing decals, you should pay attention to carefully identify the quality of the decals, do not buy some decals that are too shoddy.
3, shape: porcelain mouth flat, the bottom can be flat. In addition, Yang Kegui also reminded Tibetan friends to pay attention to the choice of fixed, reliable porcelain stores to buy porcelain, the general business will not deceive these fixed purchase groups.
Activated Carbon has a wide range of applications, such as: decolorization of sugar, military gas masks, cigarette filters, air purifiers, tap water treatment, drinking water purification, detoxification, sobering, pollution control of radioactive elements, reduction of residual pesticides in soil, soil conditioning , Governance indoor formaldehyde, vegetable preservation, and so on. This is mainly because:
The unique pore structure of activated carbon itself
Activated carbon is a type of microcrystalline carbon material that is mainly made of carbonaceous material and has a black appearance, a developed internal pore structure, a large specific surface area, and a strong adsorption capacity. Activated carbon materials have a large number of microscopic pores invisible to the naked eye. One gram of activated carbon material has micropores, and its surface area can be as high as 800-1500 square meters after unrolling, which is even higher for special applications. That is, in a rice grain-sized activated carbon granule, the internal surface area of the micropore may be equivalent to the size of a living room area. It is these highly developed, such as human capillary-like pore structure, so that activated carbon has excellent adsorption properties.
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