Putian Ancient Coins Appraisal Collection

3/3/Copy/>
Fuzhou antique porcelain and antiques appraisal
Antiques and antiques purchase antique jade purchase antique porcelain purchase antiques and antiques appraisal
Fuzhou antique agent: Manager Xie Contact number: Contact address: Fuzhou Cathay Building Building, Wusi Road Intersection, City
Identification Method Putian Ancient Coins Appraisal Collection
1. Silver identification. To identify the authenticity of silver coins, first start with identifying the authenticity of silver. Silver atomic number, element symbol, not easily oxidized, good flexibility. The luster of real silver is soft and white. The higher the fineness of silver, the whiter its luster. Real silver rounds will shine white after cleaning. The hardness of silver rounds is low. When two silver rounds are rubbed together, they feel oily and there is no sound of metal knocking (except for foreign silver coins or uneven silver coins). Fake silver coins are made of iron or steel, copper and lead, aluminum and tin, or metal powder and cement. Their color is dark and dull. Fake silver coins become ugly after being burned with fire. Some are broken, deformed, and scattered. Real silver coins do not deform or mute when burned. They are white and shiny after cleaning. Fake silver rounds will turn yellow, blue, black or gray after cleaning. Identifying silver quality is the prerequisite for collecting silver coins.
2. Listen to the sound and identify the fake. Use the tips of your thumb and forefinger to press the center of the silver circle, or use your middle finger to hold the middle of the silver circle, and hit it with another silver circle. The one with a clear and soft sound is a real silver circle. The high-pitched sound is the counterfeit currency made of steel, the hoarse sound is the counterfeit currency made of copper-tin alloy, the dull sound is the counterfeit currency clad with copper stuffing, and the silent one is the counterfeit currency made of metal powder cement. In the past, the traditional method of identifying silver rounds was to pinch the center of the silver round with the tips of your thumb and index finger and blow hard. If you can hear a slight rhyme sound, it is a real silver round, and if there is no rhyme sound, it is a fake silver round. In this method, firstly, one must have good hearing, secondly, the contact surface between the fingers and the silver round must not be too large, and thirdly, one must blow hard and listen quickly. Listening to identify counterfeit goods is the basis for identifying silver coins.
Putian Ancient Coin Appraisal Collection
3. Identifying counterfeiting with pulp. There is a layer of silver oxide on the surface of handed down silver rounds, which is often called patina. The patina mainly includes light black, light gray, light orange and millet shell color. The patina produced by rubbing it with shoe polish and grilling it with wax fire is a heavy black color that can be easily recognized at a glance. Identifying patina is an effective way to identify silver coins. Putian Ancient Coin Appraisal Collection
4. Identify counterfeiting by rust color. After silver coins stop circulating, they will rust if stored improperly. The rust layer of handed down silver coins is very thin and dark green. The unearthed silver coins generally have a thicker rust layer and some parts of the rust layer are raised. Two silver rounds are rusted together. After being broken apart, there are unevenly distributed white bright spots on the surface, which sparkle when viewed in the light. It is commonly known as pan-silver. The pan-silver phenomenon cannot be faked. Most of the silver coins unearthed from burials are reddish in color, with some green rust spots. The silver round in the puddle is covered with green rust. The rust color of real silver coins is a mark of history, which is difficult to remove and cannot be removed by boiling it with alkaline water. The artificial rust on the fake silver round is light green, which can be scraped off with your fingernails. If you prick it with a needle, it will stand upright without falling over. Boil it in alkaline water for half an hour and the rust will be gone. The rust of fake silver coins smells fishy when smelled by the nose, and smells sour when licked with the tongue. The rust color is the key to identifying silver coins. Putian Ancient Coin Appraisal Collection
5. Distinguish counterfeiting. The teeth on genuine coins are smooth and consistent in size and depth, while the teeth on fake coins are irregular, with different depths and crooked edges.
6. Dispute counterfeiting based on weight. The weight standard of genuine coins should be .g, but the wear and tear caused by circulation for a hundred years should also reach .g. Some crude counterfeit coins made of non-silver materials are often much lower than .g. Putian Ancient Coin Appraisal Collection