Reasons for the quality of ancient jade
The qualitative change of the ancient jade refers to the change of different traits of the material texture gradually occurring under the specific environmental conditions of the underground embedded in the long-term. Some changes have also taken place in the physicochemical properties. For example, the surface of the utensils is puffed and loose, and hoarfrost appears; localized surface defects appear; the overall quality of the utensils becomes "chicken bone white". These qualitative changes are gradually produced in a long-term underground closed environment. The so-called underground closed environment refers to the underground confined environment where the factors such as humidity, temperature, and pH of the fill are relatively unchanged and relatively stable after the burial of the jade. This kind of qualitative change in the underground specific environment is different from the qualitative change caused by weathering in the open environment of the earth. It is also different from the qualitative change that occurs during the long-term pass-by, which is different from strong acid corrosion, fire, frying, High-temperature and high-pressure cooking and other artificial antiques make false changes. The qualitative change of the ancient jade in the underground closed environment for a long time is called the natural qualitative change of the jade jade, which is distinguished from the qualitative change occurring under other conditions. The natural quality of the ancient jade is gradually formed during the long time, and is closely related to the texture of the material and the environmental conditions. From the perspective of raw material texture, nephrite, serpentine, quartzite and chalcedony jade are fine and tough, the main components are chemically stable, have strong acid and alkali corrosion resistance, and are relatively difficult to change. The materials in the prehistoric jade that are bright and shiny, like new works, are mostly of the above types. However, it is not absolute. There are also a considerable number of materials belonging to the above-mentioned types, which have different degrees of degree or even a deep degree of qualitative change, and those made of phosphate materials with a softer texture and lower corrosion resistance, such as turquoise Decoration, beads, etc., the jade is intact, almost no qualitative change. This situation shows that in addition to the material texture factors, the embedding environmental conditions are an important reason for the different quality of the ancient jade. The value of ancient jade comes from its intrinsic value, because its value does not change due to qualitative changes, so collecting jade does not need to consider these. Running Wear,Running Clothes,Running Clothes For Women,Running Clothes For Men YANGZHOU XIANGYU GARMENT CO.,LTD , https://www.yzxygarment.com