-
Anonymous users2024-02-11Observation of copper color method: the material of general ancient coins is bronze, red copper, brass, white copper, etc., bronze coins are easy to break, brass coins are not easy to break and wear, and white copper is mostly used for pattern coins. Before the Ming Dynasty, most coins were made of bronze, and there were no brass coins, so be careful if you find brass coins before the Ming Dynasty.
Boiling water boiling method: ancient coins are often attached to red and green rust or ancient black rust, real money rust is formed by natural oxidation for too long, the adhesion is relatively strong, so when encountering a coin with suspicious rust color, it can be put into boiling water and boiled for 30 to 40 minutes, the rust is a fake, and the rust of the real product is not easy to detach.
Steel needle test method: The rust of ancient coins is relatively hard, press the tip of the steel needle for sewing down vertically, and the steel needle will fall down immediately after letting go. The rust of counterfeit products is often mixed with adhesives and other things to coat it, and it has a certain elasticity, so the steel needle is not easy to fall.
Style determination method: the coins of each dynasty have their own style characteristics, such as the knives and cloth coins of the Spring and Autumn Period and the Warring States Period are mostly cast by craftsmen at will, and the text is ancient and beautiful, simple and simple; During the Western Jin Dynasty and the Northern and Southern Dynasties, Indian Buddhist documents were transmitted to China, and the art of calligraphy was initially formed under its influence. Tang, Song, Yuan money and calligraphy are tightly combined, and most of their money and texts are written by celebrities, which as a whole gives people a dignified and steady, jade and lovely feeling; The Liao Qian style is loose Qian Wen, while the Western Xia Qian Wen is compact, and the main characteristics of Ming Dynasty Qian are square and sluggish. The style of these coins shows the style of the era, and the later imitators can imitate their shapes but are not easy to convey their spirits, which provides us with an important basis for identification.
Comparative variety method: China's early ancient coins were all minted by hand, even the mother coins used to mint coins were also carved by hand, so there will be some differences between the coins. If a batch of coins is found with identical varieties and even some defects, it should be suspected of forgery.
Composition Analysis: Some auction houses often use modern instruments to analyze the precious ancient coins they collect before auction in order to improve the credibility of the lots. Commonly used methods include spectrochemical analysis, metallographic analysis, chemical capacity analysis and electronic non-destructive surface scanning determination.
The above analysis data can give a more accurate answer after computer comparison and analysis. This method is a qualitative and quantitative analysis of the metal composition of ancient coins, and the accuracy and reliability are high.
-
Anonymous users2024-02-10It's hard to say very clearly, if you identify it specifically, you'd better go to **, say it's not good, you know? It's not always accurate to see it
-
Anonymous users2024-02-09Summary. 1.Look at how worn out the coin is.
The handwriting of a real ancient coin is consistent with the degree of wear and tear of the coin, while on a fake ancient coin you will find that the handwriting is worn out, but the coin looks relatively new.
How to identify the authenticity of ancient coins.
1.Looking at the degree of wear and tear of the coin, the handwriting of the real ancient coin is the same as the wear and tear of the coin, while the fake ancient coin will find that the handwriting is worn, but the body looks relatively new.
2.Listen to the sound of real ancient coins due to their age, the copper oxidation is serious, and the sound of falling to the ground is dull. Fake ancient coins are relatively new to copper, and the sound they make when dropped is very crisp.
3.Smell Genuine ancient coins have a rotten smell due to their age, while fake ancient coins have a pungent glue smell, or an inexplicable fragrance.
4.The weight of real ancient coins is relatively light due to the serious oxidation of copper, while fake ancient coins appear to be heavier, and you can know it by hand.
Still not clear.
**I don't know, it is generally to distinguish the true from the false according to the above aspects.
If you can't tell the difference, you can find a special agency to help you.
It is best to use a slow-reacting solution, such as a 5% dilute sulfuric acid solution, which gradually washes away the surface of the ancient coins damaged by rust and leaves the intact parts undamaged. The length of time a copper coin is immersed in solution depends primarily on the surface state of the coin: i.e., the degree of oxidation. >>>More
At present, the pickling and grinding methods that are rumored on the Internet are serious damage to the coin base plate and pulp, and it is firmly opposed by experienced spring friends! Why can't ancient coins be cleaned with acid (including vinegar, oxalic acid, toilet cleaner, etc.)? First of all, the acid not only erodes the toning and the baseplate, but the bronze coin washes the toning and thus loses its value. >>>More
Font, rust, sound, workmanship.
Real and fake silver dollars, teach you to quickly identify.
As long as you continue to adjust the time backwards, the calendar will jump back by one day every two circles, which is not the case with other brands of watches and fake Rolexes, and the stores that buy watches in Hong Kong will also use this method to distinguish the real from the fake.