How can I make the vague copper coins see clearly?

First, ancient coins 1 common counterfeiting method, casting method. This method uses real money for model forgery. Most of the copper casting water is made of ancient copper coins or bronze mirrors, so the copper casting is still bronze or red copper due to heat rising and cold shrinking. If you can't turn over the money, you will turn over and make a small turn. There are many examples of such fake money, some of which can be confused. 2. Change the carving method. Choose a thick old copper coin to grind off the original characters, and then carve a rare one to forge. There are many such fakes. For example, the five baht is engraved as Taiqing Fengle, and the small cargo spring is engraved as Yongjing Jinghe. There is also the choice of lettering or stars and moons with vague copper coins, such as changing the lettering from two and a half to two and a half, and changing the lettering from five baht to five baht or five baht. Do something unconventional in various ways. 3. Bonding splicing method. This method is mostly used for practicing boxing, closing back and communicating with Qian Wen. Take two or more pieces of the same product, grind off some money and stick them together to form a spring, a back or the same money. There are two old money backs that have been worn out and put together into double-sided characters. 4. Color is the old method. Unearthed ancient coins have been corroded underground for a hundred years, some of them are green, some are red, green, yellow and white, and the spots are mottled, which is called "pit rust" in the coin industry. The ancient money handed down from generation to generation is sweaty due to long-term appreciation, and the money body is yellow-brown or brown. In order to obtain the surface effect of "pit-making" and "handed down from generation to generation", counterfeiters make old money in color. Common methods are: First, forging green. Because all unearthed ancient coins have green rust, only by forging ancient coins and painting them with green rust can they be realistic. There are seven ways to forge green rust: (1) Bury the forged money in the ground and take it out after two or three years, and it will be covered with green rust; (2) The forged coins are immersed in hydrochloric acid or acetic acid, then buried in the soil, and taken out after one and a half years, and covered with green rust; (3) mixing green powder with glue and coating it on money, it becomes a kind of rust similar to hard green (4) mixing green powder with rosin and coating it on counterfeit money, it becomes a kind of embroidery similar to hard green; (5) The green enamel is coated with counterfeit money. After a year and a half, the enamel is hard and looks like hard green embroidery; (6) Sticking the real copper rust on the fake product to make it look hard and green; (7) Soak the money in vinegar and add copper sulfate. The second is the method of forging red rust. Unearthed ancient coins also have red rust, and there are four ways to forge red rust: (1) burn counterfeit money thoroughly, which will bring red rust when soaked in cold water; Soak it in hydrochloric acid or acetic acid, bury it in the ground, and take it out after one and a half years, and it will have a red and green rust color, which is quite like unearthed ancient money; (2) Red powder mixed with rubber can also cause red and green rust color; (3) Red-green mixed rosin is coated on counterfeit money and becomes red-green rust; (4) Using red enamel and green enamel to coat counterfeit money will also cause red and green rust. The third is to forge ancient laws handed down from generation to generation. Ancient money handed down from generation to generation is dark brown in color, which is called handed down from generation to generation. Counterfeiters usually forge this color in the following two ways; (1) The counterfeit money is calcined with fire, taken out and cooled to make the surface of the money black, and then wrapped in clothes. After a year and a half, the color is smooth, similar to real money; (2) Soak counterfeit money in hydrochloric acid or sulfuric acid for a day or two, and it will turn black after being taken out, and then wrap it with a belt for a year and a half, and the color will gradually shine, just like money passed down from generation to generation in ancient times. Second, the style identification of 1 in the ancient money era, and the style of coins in the pre-Qin period. In the pre-Qin period, knives, cloth, round money and ant nose money were the main currencies. Most knives and cloth coins are extremely thin (cloth coins in some areas, cloth coins in Gaoyi square feet and Jimo knife coins are thicker), and the gate of knife coins is at the head end. A large amount of copper is often squeezed out of the mold at the gate and edge of the knife and cloth, which is in a natural state because it has not been polished. The edges of some forged knives and cloth coins are polished, which is actually gilding the lily and exposing the traces of forgery. Most of the figures with knives and cloth coins are carved on clay molds with knives, and they will never run away with each stroke. You can even see the traces of falling and closing knives. This kind of calligraphy in the Warring States period is fluent, beautiful, vivid and natural. However, due to the lack of in-depth research on the Warring States script, some fake calligraphy and paintings are dim in color and all strokes have been lost. Because it is difficult to copy the Warring States script, every time a forger gets real money, he can cast a fake. This kind of counterfeit money is difficult to identify, but through careful observation, it can be found that counterfeit money is generally thicker and copper is thicker. Of course, some of these counterfeit money are extremely delicate, so we must carefully observe the appearance of the whole money and the authenticity of its rust, in order to make a correct judgment. 2. Coin style in Han Dynasty. During the period of Emperor Wu of the Han Dynasty, the passage time of three baht was not long, and there were not many existences. The forger changed the engraving from five baht to three baht, but the three baht is lighter than the ordinary five baht, and the writing of the word "baht" is the same as that of the five-yuan banknote. In the early days, except for Mongolian Dayuan and Datong Bao, the amount of casting was small. Some titles are handed down only by temple money, not as money, which used to be called support money. The greater the value of the most powerful paper money at the end of the Yuan Dynasty (that is, the greater the shape of the paper money), the misalignment of the wrong faces, resulting in the phenomenon that the text and outline tilt to one side, but it is naturally unpretentious. Its back strokes are complicated, and most of them are ambiguous. Forgers often cast with real money, which is far from real money because of its poor reproduction and blurred handwriting on the back. There is also a counterfeit currency, although it is deliberately imitated, and the back is particularly clear, which also loses the bold and natural style of the original currency. Except in the case of special envoys, the amount of money cast in past dynasties is tens of millions, which is bound to be competent by skilled workers. They let go of the operation according to the process, and the counterfeiters will not imitate it, which is self-defeating. At the end of Yuan Dynasty, the coins of the peasant uprising army, such as apocalypse, destiny, divine blessing, dragon and phoenix, were not only excellent in calligraphy, but also exquisitely cast. Foundry workers who are generous in loyalty are not as good as the above four kinds, so they are called "refined and indiscriminate". Occasionally there are exquisite ones, but very few. All the above five kinds have fakes, the most of which are Apocalypse and Dragon and Phoenix. There is a kind of fake money with apocalypse treasure, which is made by changing "Ding" into "Qi". The words "Tian", "Tong" and "Bao" of fake and shoddy products are obviously out of harmony with the word "Qi". 10, the style of coins in Ming dynasty. the Ming Dynasty