1. Copper coins and silver coins: they are completely similar in shape, size and pattern to real silver coins, but mainly copper with rough patterns. The sound of knocking is sharp and bright, and there is a whistle. If you grind it on a stone, copper will be exposed.
2. Lead-plated silver coins: silver is filled with lead, and the color skin of silver coins is also filled with lead. Its pattern is the same as that of a normal silver coin, but the sound is rich, dull and gloomy when it is struck, accompanied by a "click" sound. When it is baked by fire, lead will flow out.
3. Silver coins for plywood: First, the insole is modeled with original products or catalogues, cast with cast iron, and then plated with a thin layer of silver, which looks like trachoma and sand. Although plated with real silver, it still can't completely cover up its defects, as if it were coated with a layer of glue and tightly covered on it; Secondly, the outer layer is wrapped with two layers of silver skin, and the silver layer is thick, so it is generally difficult to grind out traces. This is the most common fake silver coin, which contains copper, iron, lead and other ingredients. When knocking, the sound is short and dull, not cadence, not as beautiful and long as it really is.
4. Dumb silver coin: This is a kind of real silver coin with grains of silver, but it is damaged in the process of storage and use, such as being burned by fire, buried in the ground, hit by lime, contacting with chemical corrosive liquid, etc., so its voice becomes dumb, not as soft, crisp and tonal as ordinary silver coins. People mistakenly believe that this kind of silver coin is unreliable.
5. Private version of silver coins: privately minted silver coins, including Yuan Datou coins, Sun Yat-sen's founding commemorative coins and Beiyang-made Yanglong coins. This kind of counterfeit money is mainly trafficked from the coin market in Taiwan Province Province. It was minted in Hainan Island during the Republic of China, so it is also called Qiong Edition Silver Coin. It is characterized by high-pitched sound, poor quality of coins and less than 80% fineness of silver.
6. Washing silver coins: also known as bath silver coins, it is to etch a layer of silver from normal silver coins with nitric acid to steal some silver. It shows fuzzy or floating white patterns, and the pronunciation is slightly slow when hitting. 7. Others: Due to the socio-economic situation at that time, the income was meager and the labor was worthless. Some people file the edges of silver coins and file them out, and get silver by changing small silver coins. This kind of silver coin is only slightly lighter, which is not easy for ordinary people to detect. Generally, it can be identified by comparing a full-weight real silver coin.
However, at present, a large number of new counterfeit silver coins appear in the collection exchange market and in the streets. There are four kinds of them:
1, sand table silver coin: rough surface, blurred image, weight less than 20g. It is made of sand turning board. Just put it flat in your hand and let it fall on cement or stone, and it will break immediately, and the broken surface will be pale yellow. This kind of fake silver coin is the easiest to identify. At present, most fake Yuan Datou silver coins on the market belong to this type.
2. Silver-plated silver coins: smooth surface, clear and delicate images and vivid colors. It's almost exactly the same as a real silver coin. Because of the silver plating on the surface, it is difficult to identify from the appearance and color. This kind of silver coin can be identified by weighing. The weight of this kind of silver coin is generally 20 ~ 22g. Although it is exquisitely crafted, the proportion of metal cannot be balanced with real silver, and it can be revealed by weighing it. Although real silver coins are slightly worn in circulation, they will not be less than 25g (the original weight is 26.6g).
3. Silver coin: This kind of silver coin is cast according to its genuine pattern. The image is basically realistic and the workmanship is fine. Because it is a new copy of real silver, the metal ratio is equal. The emergence of a large number of new silver coins is because the value of silver coins in the collection is many times, dozens or even hundreds times higher than the basic silver price. Its characteristics are: first, there is absolutely no genuine rule for profile gears, and the tooth pitch is not completely equal; Second, listening to the sound is not really so beautiful and long, and the fake sound is big and sharp; Third, although some die-casting fonts are cast according to the original mold, they still lose the original charm of the original product, lacking the original charm, and appear dull, artificial and unnatural. The identification method of this kind of silver coin is as follows: (1) The silver coin before liberation was mechanical, and it was stamped with dozens of tons, so the surface was smooth as a mirror and the density of silver was good; The new silver coin, because it is simple to make, uses sand copy instead of machine stamping, so if you look at the surface and parts carefully, there are very small trachoma. Compared with the old silver coin, the image has no three-dimensional effect; (2) there is no color patina (old-fashioned), it is a sand-turning version.
4, revised silver coins: this kind of silver coins can not be recognized by the naked eye. Not only the knocking sound, but also the test of the fineness of silver coins, even the patina (old-fashioned) is antique and cannot be identified. The only way is to identify by high magnification magnifying glass, carefully look at the seams of each font, whether there are knife marks, and engrave them if there are knife marks. The method of counterfeiting is to carve or dig out the original font of real silver coins with a knife, and then paste special silver characters on it. Pretending to be handed down silver coins, profiteering.