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近年来,假铜元源源不断地出现在古币市场,造成了恶劣的影响,为防止上当受骗必须提高识别假铜元的能力,故谈一下在这方面的心得体会。旧铜元可分为沙板假铜元、机制假铜元、改刻假铜元、铜质不符假铜元、喷铜假铜元几大类。 1.沙板假铜元。沙板假铜元又可分为粗沙板假铜元、细沙板假铜元、“子砂板”假铜元和气泡假铜元四种类型。粗沙板假铜元和细沙板假铜元是用真铜元作模,翻砂浇铸而成的铜元,前者沙模选用沙粒粗大,后者选用沙粒较细。此两类假铜元表面较粗糙,铜元表面粒子较大,有不少沙眼;铜元文字、图案有模糊不清感、浮浅感;铜元伪装的古色往往偏黑、无光彩;部分铜元外缘厚薄不等。细沙板假银元表面的粒子、沙眼均较细小,古币市场出现较多的也是细沙板假铜
In recent years, fake copper endlessly appear in the coin market, resulting in a bad influence, in order to prevent being deceived must increase the ability to identify fake copper, so talk about experience in this regard. The old copper can be divided into sand fake copper, fake copper mechanism, to change the fake copper, copper does not match fake copper, copper fake copper several broad categories. 1. Sand plate fake copper. Slab fake copper can be divided into coarse sand fake copper, fine sand fake copper, “sub-sand” fake copper and fake copper four types of bubbles. Coarse copper fake copper plate and fake copper plate is made of real copper as a mold, inverted sand casting made of copper, the former choice of coarse sand sand mold, the latter selection of smaller grains of sand. These two types of fake copper surface rough, large copper surface particles, there are a lot of trachoma; copper text, the pattern has a sense of ambiguity, a sense of superficiality; copper camouflage ancient colors are often black, unpolished; part of the outer edge of copper thickness is not Wait. Fake silver sand on the surface of the particles, trachoma are smaller, more appears in the old coin market is thin sand copper plate