Hetian jade symbolizes purity, elegance, and nobleness. It has been regarded as auspicious by people since ancient times, and it is one of the collections that most people like to collect. But jade also has a new and old point. How do you identify new and old?
Natural twilight
Natural ochre is formed by certain environmental factors, and jade will form different colors in different environments. The length of time varies, and the depth of the twilight will vary. Most of the ancient jade articles unearthed in the ancient tombs have ochre changes. The reason for the ochre may be caused by the chemical components contained in the burial objects in the tomb, and may also be caused by the erosion of chemical components in the soil. The ancients have given us a lot of inspiration for this issue. It is called "twilight", which means that some ingredients in the tomb or in the soil infiltrate or break into the jade, causing the jade to change color. Modern people borrow the ancient language and use the word "twilight". .
Natural patina
Natural pulping refers to the formation of jade oxidized composites in a certain natural environment. For good tomb environment, there may be glass patina. Due to different environments, the surface of the jade is also very different. The gloss is strong and weak, but as long as it is There is no human movement, playing it, we call it a natural nourishing patina, which is different from the jade pulp that has been played in the world. The difference between the two is that the natural surface of the patina has a certain natural attachment, the change of luster is strong, the corrosion of deep corrosion is worse, the gloss of corrosion is better, and the overall change of jade pulp that has been played by humans is not Obviously, but there is still a difference between the pit and the pit. The patina that has been played by the plate has a soft gloss. The surface of the jade is cleaner and has no attached matter. The pit is thick and hard, with oily water. The environment in the tomb is not good. If there is a certain attachment (the variability of the attachment, the complexity is also the basis for us to distinguish the true and false unearthed jade). The surface of the new jade has no patina, only bright light.
Craft features
With the development of productivity, the continuous updating of production tools, and the improvement of jade tools and methods, the manufacture of jade articles also has certain characteristics of the times, such as: the Neolithic Age, the jade, the jade, the holes are drilled on both sides, and the docking is slightly biased. Move, form a table mark, the hole on the jade in this period, the outer diameter of the hole is large, and the smaller the diameter is, the smaller the inner diameter is. At the same time, the surface of the machine leaves the arc marks hanging on both sides when the wire saw is processed; the Shang Dynasty is the straight line mark left by the metal straight saw processing. The surface of Hongshan culture jade is like the use of thin edges and the central processing method. The Shang Dynasty used the double-hook hidden Yang line to decorate the details, and the lines followed the curvature of the shape. The Western Zhou jade carving forms a unique way of slope. The Warring States jade jade jade tool has been greatly improved, the jade surface is polished with glass luster, and it looks sharp. In the Han jade ornament, there is a sinuous line like a hairline, which is called “hairspringâ€, and in the jade beast, some parts of the jade bird are decorated with fine and inscribed short flat lines. This is the era of Chinese jade. Feature making skills. A deep three-dimensional carving technique is commonly used in the jade carvings of Song, Liao and Jin. The jade articles made by such techniques include jade and furnace. In the Ming Dynasty, the deep three-dimensional carvings were changed into double-layered carvings of different patterns, such as jade ornaments. In the Ming Dynasty, the erected objects were not noticed on the sides, the inner shackles and the bottom feet. In the Qing Dynasty, the rules were smooth, the work was exquisite, and the work was meticulous. This also provides us with a certain basis for the generation, but it must not be copied and copied.
Natural corrosion
Jade artifacts have been buried in different soil environments for thousands of years. The environment of the tombs will produce different corrosion changes, soil bites, bacterial erosion, changes in the surface of jade, corrosion marks, and thousands of State, but one thing is naturally formed. How do you judge whether it is natural or artificial? This depends on our usual observational power. Everywhere we pay attention to learning. The ancients have watched the ice of the glass of water and know the cold of the world. How do you apply the various types of corrosion phenomena you see in your life to the identification of ancient jade? It depends on your observation, judgment, and understanding of corrosion. Without culture and without certain natural science knowledge, it is impossible to scientifically judge the traces of true and false corrosion.
Change of jade body
Jade is the essence of stone for thousands of years. Each piece of jade has a history of thousands of years. After the formation of jade, it has entered our life. After thousands of years, the change of jade body is also the basis for judging the jade age. Through, the patina is thick and thick, the new jade is turbid, tender, and insufficient.
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