How to identify jade powder and Tian Yu (Fake Hetian jade)
Nowadays, the value of Hetian jade is still rising, which also leads to fake products. There is a kind of imitation jade products poured from jade powder in the market, and it is possible to attract a little attention to the fish. Read it today and help everyone recognize and distinguish it.
This imitation jade product is very high in fidelity, because the counterfeiter incorporates a crystal powder such as crystal in the jade powder to make it meet the standard of real jade in hardness, and can also imitate the natural texture such as “mianâ€. Experts are also difficult to distinguish. Many jade cards are made by casting jade powder in a mold. It looks white and feels fine and soft, and the jade carving is very delicate. Therefore, the jade brand made of this jade powder has almost reached the point of being fake.
How to identify the jade brand pressed out by this jade powder?
Synthetic jade made of jade powder, crystal and salt water is imitation of dark old pit jade (only for old pits). The method of identification is simple, that is, their specific gravity is different. The natural jade has a specific gravity of 3.3-3.4, while the synthetic jade has a specific gravity of only 2.8. You can tell the difference between the hand and the weight, or use the balance to weigh the true and false. It can be seen with a magnifying glass that natural jade is formed without bubbles, but artificially pressed with bubbles; then the true jade is hard and the jade powder is soft. The easiest way to do this is to use real jade.
Identification method of synthetic jade:
1. Jade powder mixed chemical high-strength coagulant is pressed at high temperature to form a process in which the color and material are similar to the special jade material. This is the most famous method in Henan folk craft in China.
â–¼ Identification method:
Seeing: artificial imitation, no matter how realistic, the visual is always a single color. From the color point of view, the color and permeability of pure natural stone are better, and the fine natural jade is not without cotton. Physical. There are never two identical leaves in the world, and two identical jade can't be found, unless it is artificial. The natural stone color is lustrous and the artificial color is bright, and it is generally in a gray state.
Hand touch: The natural stone feels slippery, and the stones rub against each other without leaving scratches. Synthetic products rub against each other, feel blemishes, and scratches occur at the friction after rubbing. This reason is mainly caused by two different hardnesses.
Tools: Using a magnifying glass, as long as it is a natural stone, there will never be a small bubble in the jade, which is determined by the chemical and physical formation of natural jade. Synthetic jade is a crystal structure that is formed by non-physical and chemical nature. Bubbles must exist, and no matter how good the process is, it will exist.
2, using natural jade powder + strengthening agent + high temperature + special mold to form high-end handmade craft - this is also the more famous Chinese Henan craft.
â–¼ This process is mostly a one-time molding product, not only the stone material is synthetic, but also the craft shape is not carved. Most of this imitation jade is generally transparent, with less cotton and more turbidity, and the brightness is gray. The identification method can be done by visual, friction and the simplest method using a magnifying glass.
3, ordinary stone powder + glass + chemical strengthening agent + artificial color (manufacturing multi-color jade)
â–¼ This multi-color manufacturing technology is a product in which quartz stone or other stone products are placed in whole or in part in a strong acid to which a dye is added. In the beginning, the transparency and brightness of the product were higher than that of natural stone. It looks better than natural stone.
Seeing: Because of the strong acid and heavy foaming, the natural crystal structure and the original chemical formula of the stone have changed. Visually, there is no oily feeling of natural stone, leaving only the feeling of light and light. Losing the unique warm color of jade itself, the texture becomes bright and regular. Natural stone is irregular cotton.
High temperature recognition: It can be heated in boiling water for 10-30 minutes. Natural jade products will not change except for the artificially polished wax layer. The color and all other visual effects will not change. After a long period of boiling water heating, the original jade will become very turbid, the original color will be reduced, and the cotton will be in the place where the color disappears. Object.
4, natural jade + special mold + ultrasonic forming process exquisite non-manufacturing crafts.
â–¼ The stone of this handicraft is natural jade, but the processing technique is non-manual carving. It is very good from the aesthetics alone, and the Seiko Department can't reach it by hand. However, the value of the collection is not high, because the process cost is low, and there is no unique value and humanized personality value, just the ordinary commodity value. However, it is a good choice for friends who do not value the value of collection and craft value as well as the unique value of baby style. After all, it is also a natural jade stone, which is always much stronger than jade.
There are two ways to identify this process.
First, look for the identification method. Mold products are first based on molds. The products of this process are mass-produced. Those who do not understand can be confirmed by looking for the second and even the third identical process.
Second, observe the identification method. After all, the mold process is not manual. The last step of the finished product is to finish the light. The light must be done by hand. Since the mold is pressed on the jade products by ultrasonic vibration, the processed products have no edges and corners, and in the process of manual lighting, there are many small gaps or faces that are not manually processed during processing. It can't be reached manually. Therefore, the final conclusion is that the brightness of the mold products is not the same as the handmade products.
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