The essentials of jade
1. Jade materials widely used in ancient jade articles include white jade, sapphire, topaz, jasper, and jade jade. At present, there are quite a few newly developed stone materials and mineral materials used in counterfeit products, or fake yellow topaz with Huang Qiyan. In practice, it is necessary to grasp and distinguish the difference between the authentic jade materials and distinguish the old and new differences of the same material.
2, to understand the basic structural characteristics of various jade materials, and to know the hardness, density non-uniformity and permeability of jade materials. After mastering the basic characteristics of jade materials, it is possible to analyze the length of time that the ancient jade is buried under certain circumstances and conditions, the influence on the jade itself, the oxidative corrosion characteristics, and the various characteristics of its evolution process. . The product is not based on the characteristics of the material, nor on the various characteristics of the real thing, but is based on the surface effect of the real product, which violates the laws of natural oxidation and evolution, and is essentially different from the real product.
3, to master the aging characteristics of the real jade materials. This phenomenon of aging and aging is re-cut and ground using new materials or old residues. The new process surface exposed after forming will produce significant chromatic aberration or damage the original oxide layer.
4. The difference jade material cannot be used as the basis for judging the authenticity of jade, because the same material used in the past millions of years has been used since ancient times. In the identification, only the identification material can be used as a single recommendation. According to the evidence, if the material cannot effectively confirm the difference, we should continue to search for evidence of the difference between the authenticity and other aspects.
5. At present, some jade variegated materials with extremely poor quality and extremely low price are used for counterfeiting, and artificially strengthened corrosion is formed after forming, resulting in extremely thick oxidative corrosion cortex on the surface of jade. This kind of cortex is easy to fall off and there is no clean and moist texture at all. This kind of flower variegated material is not used in ancient jade, but is a kind of stone used by modern deceit.
6, to understand and master the jade painting style and performance style of the past, and master the jade styling style structure of each era. In the identification of fakes, some jade can confirm the truth and falsehood from the modeling structure, but some high imitation products are extremely difficult to identify. In this case, it is necessary to search for the difference between true and false evidence from other aspects. Because the style of folk jade is extremely strange and complicated, it cannot be determined by the style of the instrument, but can only be used as a reference for the judgment of sensory effect.
7. The perfect combination of craftsmanship and art of jade art, ancient jade perfectly reflects the craft effect. However, there are obvious defects and shortcomings in this aspect, either the structural shape is beautiful and the process technology is not able to achieve this effect, or the process design is flawed.
8. We must admit that the degree of mechanization will inevitably have different effects on the quality and standard of the products. Since the ancient times, the jade equipment process and tool materials have been continuously reformed and developed, so different process technologies have been produced in different historical periods. When we master the basic characteristics of the real thing, we will realize which parts of the modern counterfeit are not the right process, and which process technology is flawed. It is necessary to realize the semi-manual and semi-mechanized way that the jade processing method has been used since ancient times. In practice, it is necessary to analyze the process effect, which are caused by the performance of the mechanical equipment itself, and which are caused by the instability of manual operation. This aspect is true or false. On the other hand, it is necessary to have the ability to know some of the process effects caused by the difference in the level of jade grinding, to know the intentional manufacturing process error or some technical defects, and to compare the difference between the dead corners of the authentic jade craft.
The difference between the materials of modern processing tools and the composition of the abrasive materials and the traditions makes the process grinding of the lines of the lines significantly different. This difference is caused by equipment tools and materials, not modern equipment can imitate. The processing and grinding of ancient jade articles mainly adopts the free sand type grinding method, which has obvious process difference with the fixed grinding type jade of modern products. It is necessary to master the rules of the ancient jade in the process of grinding, and the characteristics of various processing techniques, and compare the procedures and treatment methods of which parts of the product.
9. Understand the counterfeiting methods and techniques of counterfeit products, and master the various process effects of counterfeiting products using modern equipment and technology. It is necessary to analyze and master the difference of the glass light effect of the authentic jade, as well as the difference of the general bright jade, and analyze the difference in the technology and material of the light and the principle of causing the difference, thereby distinguishing the difference between the true and false brightness effects.
10. The ancient jade has a phenomenon of clever color and jade with color materials. However, this material has experienced long-term underground environment erosion on the original basis, causing local color material parts to be first oxidized and corroded. The characteristic law.
Most of the oxidized and etched parts of jade are caused by the hardness, density and corrosion resistance of a certain part, especially the jade crack caused by internal stress. This state will be first infiltrated or etched, and it is artificially manufactured with fake products. There are structural differences in the fake effect. Modern counterfeit products use the coloring, corner and dirty materials to smear the jade, especially the use of the material itself to smear the oxidized stone. This kind of counterfeiting has become the most important imitation tool. In fact, the hardness, density structure and chromatic aberration of the parts of the cockroach being counterfeited are essentially different from the genuine ones. It is necessary to identify which are the fake materials of the color materials and the fake skin of the natural scale, and which are the real corrosion. The true ancient jade will suffer from the phenomenon of hardness change, chromatic aberration change, osmotic transition, etc., regardless of the oxidative corrosion, and the obvious penetration phenomenon, hardness change, chromatic aberration and transition of the product. It is necessary to grasp the characteristic law of the oxidative corrosion of the real thing in a wide range of practice, on the basis of which it is different from the artificial strengthening and the real corrosion of the jade.
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