"Copy" means that the silver blank is pressed by dislocation more than twice in the printing process, resulting in the superposition of local identical patterns. What needs to be pointed out here is that the "repeated" pattern is a face, not a point. ?
The phenomenon of "off-character" is caused by broken silver or other metal objects filling the groove of the mold font, so workers should always clean up the impurities in the groove of the mold to ensure the integrity of the pattern on the silver dollar. On many silver coins, we often find that some fonts are missing a horizontal line or the patterns are broken, which is the phenomenon of "missing words", and a large number of typos are produced in this way. ?
"Penetration" belongs to excessive mechanical pressure, which leads to the pattern on one side of the silver dollar being reflected on the other side;
The "shading" is caused by the molds, because there is no silver blank in the mold contact with each other, which makes the pattern on the other mold leave a bump mark, and finally the "shading" pattern is reflected in the finished silver dollar. ?
How to distinguish between "general beating" and "yin beating"? The key is to see whether the silver dollar pattern is convex or concave. The simple way is to look at the outline and area of the group. Those whose outlines and pattern areas are blurred are called "through play"; Clear outline of lines and small pattern area are "negative strokes". In Sun Yat-sen's commemorative coins for the founding of the People's Republic of China, many heads, circles and leaves are all "Yin".
Guang Yuan Lao Yuan Yin
The original silver dollar is an old silver dollar that still has its original luster when it was manufactured. The meaning of the original light was originally a sign to measure the first-class products of old silver dollars, because whether an old silver dollar has original light or how much original light has directly reflected the use and wear degree of silver dollars, and its value varies greatly.
After nearly a hundred years of preservation or burial, the luster of the original old silver dollar is different from that of the new silver dollar. The usual visual feature is milky white with a certain thickness and hardness, similar to flour, so it is often called "pink light" by collectors; The original light buried for a long time in the humid area of the south is similar to wet lime and is called "cellar original light"; The original light stored in wooden cases for a long time is golden yellow, which is called "golden light". Early counterfeiters used silver washing liquid to wash off the rusty copper rust on the surface of ordinary products to pretend to be true light. However, the luster of the washed old silver dollar is similar to that of the new silver dollar, and the impression is neither "pink" nor "thick", which can not change the original wear degree and is easier to distinguish; In recent years, some counterfeiters have mixed a large amount of silver lotion with silver mud or gold lotion with gold mud, and then used it to clean old silver coins, intentionally leaving silver mud or gold mud on the surface of old silver coins, which looks like "pink light" or "golden light". However, the residual silver mud or gold mud particles are loose, floating and waterlogged, so it is not difficult for buyers to distinguish them as long as they observe them carefully.
The original silver dollar is divided into three grades: original light, original light and pure original light. The original light level means that there is some original light on the surface of the silver dollar, and the luster is average; The original light level means that the original light on the surface of the silver dollar is comprehensive and shiny; Pure original light level means that the original light on the surface of silver dollar is almost intact and has a strong luster. The old silver dollar has always been a favorite of collectors. Among the few old silver dollars in the world today, there are very few old silver dollars with original light, and even fewer ones with pure original light are very rare. Therefore, the market price of the original old silver dollar is much higher than that of ordinary products. With the increasing popularity of collection, it has been difficult to find the original silver dollar in recent years, so its market price is also rising rapidly. Now, if you have an old silver dollar, it will attract the envy of countless collectors, because the old silver dollar is no longer a collection that you can buy with money. The original light means luxury and pride! ! !
Silver coin "with light"
After the machine-cast silver coins are cast, they are demoulded with butter. Under the action of butter, the surface of silver coins is oxidized to form a light brown or light blue layer that is easy to be destroyed, which becomes a special aesthetic feeling in the collection of silver coins. This luster is called "luster". Because this luster is easy to protect, "shiny" silver coins are basically unnecessary and naturally precious. ? "Bright" non-circulating silver coins are recognized as the best silver coins. The value of this kind of silver coin is ten times or even dozens of times higher than that of similar silver coins that are not "shiny".
Summary: The original lamp was demoulded with butter. The surface of silver coins has been oxidized for a long time (nearly a hundred years) under the action of butter, which cannot be simulated at present, so the original light has become a natural barrier for the anti-counterfeiting of old silver coins.