The bright effect of the jade articles of the Qing Dynasty is closely related to the pre-grinding of jade articles. When the jade articles of the Qing Dynasty were formed, the overall brightness has been greatly improved. Due to the fineness of the polishing material, the overall gloss of the jade is moderate after polishing, and the surface of the jade is rarely found to have scratches, and the pattern of the jade still maintains the clear effect of the pre-grinding. In the early grinding process, modern imitation products are rough and have poor light intensity. In order to achieve high brightness, it takes a long time to enhance polishing. Although the brightness has been improved, due to the enhanced polishing, the jade patterns and textures are damaged, and even the fine textures are blurred. The inner wall of the jade with openwork cannot be effectively polished, resulting in errors in the light of various parts. Modern jade is processed with high efficiency and high precision, and the process defects generated in this case are difficult to overcome and remedy. The jade articles of the Tang Dynasty did not have the same kind of glass luster as the Han Dynasty, nor the kind of light of the Ming Dynasty. Instead, they polished a kind of matte. This kind of luster could not express the warmth of jade, and the kind in the middle of the Qing Dynasty. Wax can't be the same. That is to say, the polishing technology of the jade articles of the Tang Dynasty is not outstanding, and some imitations are prone to overshoot in this link. The polishing technique of the jade in the Song Dynasty was much more advanced than that in the Tang Dynasty. The surface of the jade also did not show the glass highlights of the Han Dynasty and the Ming Dynasty, but the warmth and mellowness of the jade can be effectively expressed. Of course, there is still a distance from the wax effect in the middle of the Qing Dynasty. Some jade articles in the Tang Dynasty obviously received the influence of extraterritorial culture, such as Hu Ren and Fei Tian, ​​while the jade articles of the Song Dynasty were more traditionally returned through the jade production in the Central Plains, satisfying the appeals from the cultural level of the Central Plains and the aesthetics of the market. Supply and demand. Together with Liaojin in the north, it constitutes a jade culture era with North-South style compatibility. The jade craftsmen of Liao, Jin and Song have the characteristics of exile and migration. The uncertainty of their residence directly leads to the noisy north and south of the jade technology. Therefore, the jade carvings of the Song Dynasty and Liao Jin are obviously different in composition, but there are many commonalities in the techniques. In the creation of literature, there has always been the saying that "the Tang people are still interested, the Song people are still reasonable". In the Tang Dynasty, whether it is literary creation or craft production, there is no such thing as the "five horses, the golden dragons, the call" in the Song Dynasty. The children will be replaced with fine wines, and they will be sold with the same eternal spirit. The patterns and shapes reflected in the jade production are often innovative. In addition to the Hu people's ornamentation with extraterrestrial style, there are still many flowers and ornaments, birds and animals, more than ever; In the Song Dynasty, under the social form of the science of Dachang, it concealed the self-deception of the seemingly peaceful and prosperous. For example, in literature, "the cover will be changed from its own", and suddenly "the cover will be viewed from its invariant", and it will be reflected in the philosophical overturn, reflected in the production and technological innovation and development of jade. More is devoted to the study of ancient systems, re-emphasizing the ancient and ancient feelings, and based on the records of the classics to curb ancient jade. The jade in the Tang Dynasty is a proprietary craft of the upper bureaucracy. Made in the Song Dynasty, the carvings clearly showed a style similar to that of the civilians. In general, the difference between Tang and Song jade is a distinct difference in the identification of the knife marks: the characteristics of the Tang Dynasty knife are deep and light, the strength of the knife is very large, you can cut to the appropriate depth. And the knife is gradually pulled out. In this change in the strength of the knife, the blade of the surface of the carving is visible. There are many explanations for this phenomenon, such as the "Hangba", "style" and so on. What is important is the form of the Tang Dynasty's craftsmanship and the taste; and the Song Dynasty carving technique. It is light and light, and there is no blade strength. Compared with the Tang Dynasty, it seems very rational, not staunch, and it is better to regard it as a kind of style. In the Shang Dynasty, the carving process of jade was mostly made by using a tool with a hardness higher than that of jade, and the speed was very slow. Therefore, the surface of the jade was very smooth and moist, and almost no small plane was visible. Fine, consistent with the patina on the jade surface. In the late Neolithic period, although the surface was used in the previous processing, the process was obviously rough, and many different small faces could be seen on the surface of the jade. In the Shang Dynasty, due to the use of cooking utensils, the use of jade sand and water honing, the speed is accelerated, so the surface of the jade will leave a linear polishing mark with different depths, different thickness and irregularity, especially under the mouth of a round animal or character. After the ear, the turning point is more obvious. In the middle and late Western Zhou Dynasty, due to the fine grinding, the scratches on the surface and scars are not very obvious. In the war, the grinding process has reached its peak. It is precisely because of the finer grinding that a large amount of glass light on jade will appear. This is a very important feature of the war jade. We are specialize in custom made different types of Silicone Gasket & Silicone Seal, non-return valves, air flow valves, rubber check valves, which are used for controlling the direction of fluids' flow. 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Polishing techniques of jade carving in different periods in ancient times