Probe virtual currency
it's hard to tell whether it's real money or fake money just from the photos. But you can't tell the true from the false with the naked eye. If the coin is true or false, it should be verified by experts.
1. Smell
this method is the simplest one in the identification of ancient coins. Because counterfeit coins are mostly decorated with chemical substances, they often emit an unpleasant and pungent chemical smell, while genuine coins do not
Because of the texture of ancient coins, the older the age, the more serious the oxidation, and the more mb the sound. Generally speaking, the ancient coins before the Ming Dynasty are mute However, since Ming Dynasty, coins have not been deeply oxidized, and their sound is clear and loud. If the coins of the pre Qin period are thrown on the ground and there is a clear sound, then the money is not very reliable; If the coins of Ming and Qing Dynasties are mb, they will be doubted There are no more than two kinds of coins seen today: one is excavated, the other is handed down. The excavated objects have been buried underground for many years, and their surfaces are covered with copper rust. Handed down procts also e to oxidation in the air, the surface has a layer of slurry. Black or copper 
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precautions for the maintenance of copper coins:
when saving copper coins, it is best to wrap them in kraft paper and place them in a ventilated place. And change the new kraft paper regularly every year. Improper preservation of copper coins will also affect its appearance to a great extent. It is suggested that copper coins should be kept away from direct contact with air, especially moist air, because oxidation reaction may occur after contact with air, thus affecting its appearance
when viewing copper coins, if you need to take them out, you must use tweezers or wear clean gloves to take them out. Only in this way can you avoid the sweat stains on your hands to the maximum extent and damage the appearance of coins
put the coins under test in clean water and take them out after a few days. The mud, oil and rust on the coins will be removed. It's easy to find the forgery on the counterfeit money< Second, the probe method is used to test the authenticity of ancient coins
for some doubtful parts of the North test coins, sewing needles and other objects can be used for tentative pricking. Ancient coins are really rusty, with strong adhesion and hardness. If you press the needle tip down vertically, the needle will fall down when you let it go. The rust of counterfeit currency has slight elasticity, and the steel needle is not easy to fall down
thirdly, to test the authenticity of ancient coins by friction method
rub the side road of the rusty coins on the concrete floor or on the fine sandpaper for several times to see whether the copper color of the coins in the observation period is consistent with that of the coins of the same era. If the coin is put together, the gap may be exposed after friction< Fourthly, acid test is used to test the authenticity of ancient coins
for coins with serious rust, soak them in edible vinegar for a while, or use diluted hydrochloric acid for local spot check, or use both to find out the rust. Acid test is the most suitable method to identify the authenticity of silver coins. However, it is necessary to be cautious.
put the coins under test in clean water and take them out after a few days. The mud, oil and rust on the coins will be removed. It's easy to find the forgery on the counterfeit money< Second, the probe method is used to test the authenticity of ancient coins
for some doubtful parts of the North test coins, sewing needles and other objects can be used for tentative pricking. Ancient coins are really rusty, with strong adhesion and hardness. If you press the needle tip down vertically, the needle will fall down when you let it go. The rust of counterfeit currency has slight elasticity, and the steel needle is not easy to fall down
thirdly, to test the authenticity of ancient coins by friction method
rub the side road of the rusty coins on the concrete floor or on the fine sandpaper for several times to see whether the copper color of the coins in the observation period is consistent with that of the coins of the same era. If the coin is put together, the gap may be exposed after friction< Fourthly, acid test is used to test the authenticity of ancient coins
for coins with serious rust, soak them in edible vinegar for a while, or use diluted hydrochloric acid for local spot check, or use both to find out the rust. Acid test is the most suitable method to identify the authenticity of silver coins. However, it is necessary to be cautious.
1. Knock and listen. Because of the different casting years of ancient coins, the quality of impurities in the materials is also different, so the sound of knocking is also different. The more impurities such as tin and lead are lost in ancient coins, the more ll their sound will sound if they are knocked lightly. On the contrary, the clearer their sound will be
1、 Listen to the sound. The longer the ancient copper coins are, the more serious the calcification is. The calcified copper coins lose the original sound of copper, and the sound of metal impact is ll. The smaller the sound is, the longer the time is. Any copper coin with a high pitched voice can be regarded as a new one because it shows no calcification
Second, smell the odor to determine the authenticity. The longer the copper coin is oxidized, the more serious the oxidation is. The longer the copper coin is oxidized, the less the copper smell is. All ancient coins with heavy copper smell can be judged as counterfeit Third, judging the rust color determines the authenticity. Copper coins will rust if they are not stored properly after they are out of circulation. The rust layer of the ancient copper coin is thin, and the rust is local, and most of the coin surface is ancient black. The color of rust varies with the pit mouth. The rust layer of the copper coins unearthed from the earth pit is generally thick. When the rusted copper coins are knocked open, there are "Pan gold", "Pan silver" and "Pan blue" phenomena"three pan" phenomenon can not be imitated; Generally, the rust layer of copper coins unearthed in sand pits is thin, and the surface of coins is mostly red and yellow rust; The rust color of shuikeng copper coin is all over the coin surface, showing dark green. The rust of ancient copper coins is from the inside to the outside. Experts call it "hair rust" and "bone rust". It is very difficult to remove the real rust. Any copper coin whose rust is easy to remove can be judged as a fake
(4) tongue licking can determine the authenticity. Lick the money face with the tongue, the real proct is tasteless. If there is a sour, bitter, astringent taste, it can be determined that it is artificial rust or pulp, it must be false (5) boiled with water. The rust on the ancient copper coin is green or red, yellow or blue, with strong adhesion. In case of suspicious rust color of Gaogu coin, put it into boiling water for 20 minutes to see the rust color. If the rust color does not change, the real coin will be judged as fake{rrrrrrr}
extended materials:
precautions for the maintenance of ancient copper coins:
the maintenance of ancient coins is mainly rust removal, and there are many ways to remove rust. Experts suggest that it is not easy to remove rust thoroughly, and it is better to remove the floating rust on the surface and see the words clearly. Do not remove rust in strong acid or alkali, and do not use sharp tools to remove rust. This will damage ancient coins
the most ideal way is to use a large oil painting brush, subtract the brown hair on the tip of the nose, and leave only 5-7mm of the root. Using this self-made brush to brush the rust on the ancient coins, you can just brush away the rust and resial embroidery on the ancient coins without damaging the slurry on the ancient coins
put the coins under test in clean water and take them out after a few days. The mud, oil and rust on the coins will be removed. It's easy to find the forgery on the counterfeit money< Second, the probe method is used to test the authenticity of ancient coins
for some doubtful parts of the North test coins, sewing needles and other objects can be used for tentative pricking. Ancient coins are really rusty, with strong adhesion and hardness. If you press the needle tip down vertically, the needle will fall down when you let it go. The rust of counterfeit currency has slight elasticity, and the steel needle is not easy to fall down
thirdly, to test the authenticity of ancient coins by friction method
rub the side road of the rusty coins on the concrete floor or on the fine sandpaper for several times to see whether the copper color of the coins in the observation period is consistent with that of the coins of the same era. If the coin is put together, the gap may be exposed after friction.
Ancient coins refer to ancient coins. Money is the proct of commodity exchange. China is the first country in the world to use coins. 3000 years ago, the tombs of the late Shang Dynasty unearthed a lot of "bronze shells without inscription", which are the most primitive metal coins
In the late Western Zhou Dynasty, in addition to shell coins, there were some metal weighing coins such as loose copper pieces and ingots, which were also unearthed in archaeological excavations. Chinese coins have created and broken many of the world's best and China's best by the China World Record Association How to identify the authenticity of ancient coins in formthe authenticity of ancient coins can be identified from the aspects of shape, casting technology, material composition and text. To see the size of the difference between an ancient coin and its time characteristics, if the difference is too big, we should pay attention to whether it is a fake
the real coins have clear and regular inscriptions, patterns, outlines and perforations. The natural abrasion and impact scars on the surface are irregularly distributed. The counterfeit coins are rough, with unclear inscriptions, patterns and outlines, with trachoma and air holes. The surface abrasion and impact scars have rules or no abrasion and scars
How to distinguish the true and false ancient coinsthe handwriting of counterfeit currency is generally fuzzy, while the handwriting of real currency becomes fuzzy after long-term wear and tear. In this case, we need to refer to the copper wear of the coin body
the handwriting of real money is blurred, usually in a large area. At the same time, the money body is also subject to great wear, that is, the degree of fuzziness of the handwriting is synchronized with the wear of the money body, while the counterfeit money is usually complete, the copper is relatively new, but the handwriting is blurred
The value of collection lies in the history of the collection itself. That's the heritage of culture. Only by understanding them can we experience the fun of collection. Only by knowing them can we avoid being cheated