With the growing popularity of Sun Xiaotou's silver dollar market, more and more Tibetan friends have begun to pay attention to Sun Xiaotou, but the collection is risky and the investment needs to be cautious. Next, I'd like to introduce some recognition skills of Sun Xiaotou:
1. silver
Silver is the metallic color of the silver circle. The silver-white color of the real silver circle is moist and soft, and a natural Qin color is revealed in the color. Although the fake silver circle is made of silver, its silver color is different from that of the old silver circle because of the formula of metal components. Generally, it is white with blue, with strong luster and harsh color. In jargon, it is a thief. This is easier to master through too much observation.
sound
If you play a real silver ring, the sound frequency is low, and it will make a long, soft and pleasant sound. Because of the problem of metal composition and different manufacturing processes, the sound of fake silver rings is always sharp and the frequency of the sound is very high. However, it should be noted that some real silver circles also have bad voices, commonly known as dumb versions. Sound is only one of the bases for identifying silver rings.
Step 3: patina
The patina of silver round is a layer of dark attachment produced by surface oxidation of silver round during its circulation and use. Very thin, but its performance is very stable and it is not easy to fade. Modern fake silver coins are made by infrared scanning and other technologies, and their weight and patterns are basically close to real coins, so patina is particularly important for the identification of silver coins. At high magnification, the true patina shows that its patina attachments are loose and accumulate like oil sweat, and the layers are very rich, especially in the gaps between the characters, patterns and internal teeth of the silver circle. In order to overcome its bright silver, modern fake silver circles are often coated with a layer of fake patina by chemical or other methods. This kind of pseudo-patina is monotonous in color and dim in level under high magnification, which is actually a color change caused by surface chemical changes. Mastering this method is very important for identifying silver circles.
4. Side teeth
The side teeth of the silver ring have two major functions: anti-counterfeiting and metal theft prevention. In the identification of silver rings, side teeth are a very important link. A common fatal weakness of modern high imitation silver ring is that the lateral teeth can't pass. The side teeth of a real silver circle are neat and even, slightly curved, and seem to be composed of two thin lines. Generally, the side teeth have traces of natural wear, and the side teeth have patina, which is difficult to wash off even if the coins are washed. The side teeth of the fake silver ring are irregular, uneven, without arc, very stiff, and there are many traces of manual processing on the side teeth. It is not difficult to find out by observing more.
5. Machine-cast particles
Machine-made casting pattern is a kind of pattern produced in the stamping process of machine-made coins. In the evaluation of coin grade, the performance of machine-made engraving is one of the important factors affecting the grade. Identifying silver rings by machine-cast patterns is not familiar to collectors. Here, let's first introduce the causes and characteristics of machine casting lines: the manufacturing machine of silver coins is hydraulic press, which has great pressure. When the prototype cake of silver coin is put into the steel mold, the machine presses the steel mold. Because the volume of the mold is fixed, the embryo cake will only extend from the center of the steel mold to the periphery after being subjected to great pressure, thus producing a thin line that diverges from the center of the embryo cake (the center of the silver ring) to the periphery. This is a machine-cast wire generation. Although some modern fake silver rings are also formed by machine stamping, due to the advanced conditions of modern machinery, the pressure is far from that of real silver rings, so it is difficult to cast patterns. The machine-cast patterns of real silver rings and polished silver rings are generally very obvious. Even if there is a worn silver ring, although the machine-cast pattern in a large area is not obvious, it is not easy to be worn off because of the protection of internal teeth around the teeth in the silver ring. As long as you look carefully with a magnifying glass, it is not difficult to find the machine-cast pattern.