2. Look at the thickness. The five emperors' coins are all small flat coins with a diameter of about1-3 mm. Even if they are dry, the thickness will not exceed 4 mm.
3. Look at Qian Wen. The real five emperors' coins were legal tender issued by the state at that time, and the characters were very strong. Moreover, the characters of these five generations of coins are regular, with their own characteristics and different faces.
4. Look at the color. Due to the age, ancient coins are generally seriously corroded. Whether it is hard green rust or soil rust, it is rusted in the bones, and even the whole body is rusted, so it cannot be easily peeled off.
5. Listen to the sound. Throwing copper coins on the concrete floor, the reverberation is false, and the five emperors really groan short and hoarse.
6. The real five emperors' money is ancient money. In the process of long-term use, the edge is polished a lot, so it is smoother. Fake money is made in batches, and the edge of the big circle has not been processed, so the round edge of the money has obvious corner cutting.
Extended data:
Common forgery methods:
1, turning over sand for fraud. According to the extended diagram in the money spectrum, mold making and sand turning.
2. change the lettering. Take common products as models, change a word on the sand table, or add decorative marks such as clouds and birds.
3. Digging and forgery. The common practices are as follows: First, remove the characters from ordinary ancient coins, and make other Qian Wen with copper sheets to supplement them with rare products; The second is to remove Qian Wen from the same two ordinary products and exchange subsidies with each other to become two different products; The third is to remove a character from the ordinary product, and then fill it with raw lacquer to form a variant; The fourth is to repair and transform the money body with raw lacquer; The fifth is to add Qian Wen to the back of common currency.
4. Splicing and faking. Grind off one side of two pieces of money of similar size and stick them together.
5. False color forgery. Fake money must be disguised as fake colors, and the fake colors of ancient money mainly include fake rust and fake antiques handed down from generation to generation. The method of fake rust includes: burying counterfeit money in wet and acidic soil; The fake money is soaked in acid solution for a year and a half, and then it is taken out. Fake method of handed down antiques: After the fake money is calcined or soaked in acid solution, it will rub with you all the year round, which will produce shiny handed down antiques.
Baidu encyclopedia: five emperors' money