How to identify the authenticity of Tongzhi Bao Tong copper coins? What is the price?

Due to the rarity of ancient Chinese coins, their value is becoming more and more noble, so fakes emerge one after another, deceiving many coin collectors. In the face of today's mixed coin collection market, it is necessary to master some methods to identify counterfeit ancient coins. The following is a brief introduction to several commonly used methods of counterfeit goods identification.

(1) Test method for sewing steel needles

The true rust of ancient money is not only strong in adhesion, but also hard. Stand the needle for sewing clothes on the ancient money with the needle tip facing down and press it vertically. When you let go, the needle will fall off. If it is counterfeit, the steel needle is not easy to fall off because of the slight elasticity of rust mixed with adhesive.

(2) Boiling water cooking method

Red and green rust is often attached to the surface of ancient coins, and the rust of real coins has strong adhesion. Therefore, whenever you see a "treasure" with suspicious rust color, you can put it in boiling water and cook it for about 30 minutes. After boiling, the rust is fake, and the real rust is not easy to remove.

(3) Comparative editing method

The production of ancient coins is different from the machine-made coins in the Republic of China, and their casting molds (mother coins) are all hand-carved. Although there was a special inspection and supervision organization to check and accept the mold at that time, there were inevitably inspection omissions. So there will be some different versions of money flowing out to form treasures. In these different versions of coins, there will be some obvious differences between them. In case there are a group of "treasures" whose versions are exactly the same, or even the degree of local depression is exactly the same, then these "treasures" are suspected of counterfeiting.

(4) Methods of observing copper color

Generally, the materials of ancient coins can be roughly divided into three types: copper, brass and bronze. Most of the coins before the Ming Dynasty were bronze, not brass. Copper coins are easier to break, but brass coins are not.

(5) sound discrimination and listening method

The older an ancient coin is, the duller its sound becomes.

The above are five commonly used methods to identify the authenticity of ancient coins. However, in recent years, counterfeit precious coins with very modern and high-tech counterfeiting methods have been found in the market. For example, using modern micro milling machines and grinders to process a real ordinary product and turn it into another kind of treasure; First use rubbing scanning, then use laser plate making, etc. These counterfeits are generally difficult to identify, which requires collectors to keep a high degree of vigilance at all times and achieve "more than two", that is, read more ancient coin maps and books and get in touch with ancient coins. Only in this way can we improve the ability to identify the authenticity of ancient money.

Imitation technology of ancient coins and its identification points;

(1) Turning sand. Carve ancient money models with wood, bones or soft stones to turn over sand, or make models with original money to turn over sand. This kind of fake shrinks and deforms when it is cold, so it needs polishing, so its shape is smaller than that of similar real money, and its thickness is uneven, and the file marks on the edge are messy, which is not as smooth and stable as ancient money.

2 change the lettering. Choose thick old copper coins to grind off the original text and carve a rare text. The characters engraved with this kind of counterfeit money are generally different from the real money. The strokes are different in thickness, the font is dull, the copper surface around the font is uneven, and the new copper is exposed, which is different from the handed down antiques.

③ digging and mending. It is to dig out half or all of the words of ordinary old money, and then use other words of money or copper pieces to make words to subsidize them, or use half of two old money to piece together. This kind of counterfeit money always leaves traces such as welding, grinding or bonding. As long as the money is gently thrown on the ground, it will make a sound of breaking the shell and be easier to identify.

(4) Carve characters or stars and moons with flowing copper lines left on the surface of ancient coins when they were first cast. Because this kind of counterfeit money uses the natural flow of copper on ancient money, the lettering and lines will be crooked, the style will be different, and there will be new engraved knife marks.

⑤ Exchange bronze mirrors for round money. This kind of fake money, its Qian Wen, rust color, handed down from generation to generation and so on are often the same as real money. The difference is that its square hole and excircle need to be chiseled, which is not as smooth and natural as real money, and it is chiseled and can still be recognized after fake rust.

In these counterfeiting methods, it is often necessary to cover up new gouges and make them rust and become old. There are various methods, such as painting, burying in the ground, sticking rust, soaking in acid and so on. But this kind of fake rust floats on the money table, which looks rough, frivolous and loose. If it is soaked and washed with boiling water, it can basically be removed. In addition, ancient money is not angry and earthy; Fakes are full of anger, and some of them stink. This is also one of the ways to distinguish.