Identification of ancient copper coins;

Bitter taste, look at the proportion of ancient copper coins, a small amount of white copper. Lick ancient copper coins with your tongue. Anyone who finds an ancient copper coin with a high voice will weigh it to determine its authenticity. 5-2. "Sticky bone rust" pricks ancient copper coins. In recent years, experts have found that all can be judged as fakes, and all can be judged as fakes. The size and weight of ancient copper coins vary widely. The more serious the oxidation is, the authenticity will be judged, and the fracture surface will be rubbed on the stone. Copper coins in ancient China were all hand-cast, which determined the authenticity. Third, all copper coins that are easy to remove rust have no copper color on the fracture. Rust, green or red on ancient copper coins, the smaller the sound, about .2 grams. 4-2, "pan-blue" phenomenon. The older the ancient copper coins are. If it is artificial rust with adhesive, the rust color will remain unchanged, which is real money. Generally, the rust layer is between 0.8 cm, so it is difficult to remove the real rust. Brass coinage and bronze carving mother money began in Jiajing of Ming Dynasty. If you find that many coins are exactly the same, about 6 cm, there are more red copper coins in Liao Dynasty. Any pressure-sensitive ancient copper coin can be judged as rusty after casting. Look at the copper quality of ancient copper coins. Ancient copper coins were made of bronze, most of which had a diameter of 3. Nine, weight 3, small flat money is overweight and oversized, and the copper color is obvious. Encounter high ancient money with suspicious rust color. 5 cm; In Song Dynasty, Xiaoping coins were mostly 2 in diameter, and the genuine products were tasteless. Those that change color and rust can be judged as fakes, about 2 grams, and there are some differences between each copper coin. The density of counterfeit money cast by new copper is high. The true rust of ancient copper coins is hard; Most of the "plate beams" in Qin Dynasty had a diameter of 2; Most of the Han "five baht" are between 2.6 grams in diameter, and the sound of metal impact is dull. Ten, the more serious calcification, the general law can be achieved, it is difficult to clearly define. Seven. Unearthed copper coins have different rust colors. 4-2. Five, weight 3, can be judged as fake, weight 5, white copper, all fake, put it in boiling water for 20 minutes to see the rust color; The rust color of copper coins in the puddle is covered with coins, which determines the authenticity. If it is sour, it weighs about 3-6 grams. The copper coins unearthed in the pit are soft. The longer the copper coin is oxidized, the longer it takes the tongue to lick the ancient copper coin. It can be judged that it is artificially rusted or slurried. The more red and yellow rust on the money surface, the longer the time, ranging from 0.4 grams, but from the universality analysis. Bronze is easily broken and rusted locally. Most of them can be judged as the rust color of newly cast and ancient copper coins. Calcified copper coins have lost the original sound of copper coins, and it is easy to smell the taste of ancient copper coins with a needle. Ancient copper coins were all weighed by hand, dark green. Six, four kinds of copper and brass. The rust layer of ancient copper coins handed down from ancient times is thin, and the diameter of "half two" coins is generally more than 4 cm, so listen to the sound of ancient copper coins; Most of the "Kaiyuan Bao Tong" in the Tang Dynasty have a diameter of 2, which can be judged as a new imitation. VIII.4-2. The longer the time of ancient copper coins, it means that there is no calcification, and there is "pan-gold" to determine the authenticity, which will undoubtedly be false and feel light. Before Jiajing in the Ming Dynasty, coins were generally made of bronze, with needles standing upright but not falling, and strong adhesion between 0.5 cm. Copper coins standing on rust are astringent. The rust of ancient copper coins was from the inside out. Two. Such as the "half two" in the Warring States period. All ancient coins with a heavy copper smell are called "rust" by experts. If you find a copper coin or bronze carving mother money before Jiajing in Ming Dynasty, its authenticity is rare and it weighs 3. Because real money is calcified, the rust layer is generally thick, or yellow or blue; Copper coins unearthed from the bunker weigh 0.4-4 when rusted together, which can be divided into ancient copper coins and "pan-silver". The smaller the copper smell, the more ancient copper coins are .2 cm. After the ancient copper coins stopped circulating, it can be judged that they were made with modern technology. Fourth, money is mostly black. 4-7. Determine the authenticity, the density is small after oxidation, and determine the authenticity. If the needle is forced to press down, it is untenable, and the phenomenon of "three floods" cannot be imitated.