古钱币鉴赏典当知识（Ancient coins; appreciation; knowledge of pawn）.doc

古钱币鉴赏典当知识（Ancient coins; appreciation; knowledge of pawn） A common method to ancient coins 1, casting method. This method to the original model of real money forgery. Casting copper water for ancient coins or bronze mirrors and so melt cast copper, bronze or copper is still. Due to thermal expansion and contraction to turn money to cause cost less than the cost, which cast a turn. The pseudo money listed many, some may be spurious. 2, modified moment method. The thicker the old coins rubbed off the original text, aratamekoku another rare goods to fake. The number of counterfeit goods. As for five baht aratamekoku too small money fengle, aratamekoku WIKO king and etc.. The fuzzy system and select the coins engraved text or as aratamekoku for half moon, 22 or semilobate, aratamekoku 55 or five baht baht baht. New in order to be different in various ways. 3, adhesive connection method. This method is used for even the spring, back to back, with the money. Take the same number of pieces of goods to two, remove part of the money into the bonded assembly, spring, or even back to back with the money. There are two old money to back together, become two words. 4, the old method of color. After a hundred years of ancient coins excavated underground corrosion, some covered with green, red, green, yellow, or white, mottled, coins called raw rust pit. The old coins handed down for a long time. Sweat money into the table, the yellow or brown body. Zuoweizhe for pit and ancient surface effect, the pseudo color for the old money. The common methods are as follows: Is a fake green. Because ancient coins have unearthed ancient coins with forged green rust, so green rust, can realistically, there are seven ways to forge patina: (1) the counterfeit money buried in the soil, after two or three years out, there are covered with green rust; (2) the counterfeit money is soaked in hydrochloric acid or acetic acid, and then buried in the soil after taken out after a year or so, there are co