Old silver dollar professional identification method:
First, listening to the sound: use two silver dollars to knock each other, listen to their voice, true silver yuan: the sound "flat" soft and long, the audio time interval can be up to 4 seconds; fake silver dollar: the sound "point", although the ring But the tip is light and the sound is from high to low, the sound is too short, and the audio drop is large.
Second, the method of measuring the amount: use the middle finger to lick the weight of its currency, whether it feels light. If the inside of the fake silver, such as copper, lead, zinc, tin, etc., there is a certain feeling in weight.
Third, the weighing method: to see whether its weight is consistent with the weight of the real currency, the general fake silver dollar in the weight difference.
Fourth, the visual method: use the naked eye to carefully check the silver color of the old patina color, pattern, pattern, size, thickness, dark note, teeth are normal. The fake silver dollar is generally swollen with a pattern of light weight and light weight. The silver color is gray or dull (its composition contains copper, lead, zinc, tin), the pattern is not very convex or blurred, the edges are rough, and the teeth are handmade. The other is a mechanism of fake silver dollar, which is mainly characterized by using real money as a template, using an advanced EDM machine or a copy milling machine to reproduce the impression of the fake silver dollar, using ordinary copper zinc plate as the core of the blank cake. Silver is made into a cake, which is then pressed on a hydraulic press, and finally a layer of silver powder is sprayed on the surface of the silver dollar. This currency is similar to the real silver dollar in appearance, and it is more deceptive. However, if you look closely, the middle part of the fake silver dollar plate seems to have a full belly shape, the pattern is rough, the strokes are blurred, the lines of the characters are not smooth, the thickness is uneven, and the three-dimensional and layered features are lacking.
V. Textual research: First, it is necessary to understand the silver dollar's casting time, the number of issuance, the craft pattern, the weight and the historical background. Second, remember to blindly collect, and you must know more about your favorite silver dollar. Take time to check the relevant information of this currency; third, you can also use high-tech and chemical drugs to analyze the various elements of the currency (remind one point: chemical drugs are more destructive to the currency).
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