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How to tell if an old coin has been cleaned?
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<p>[QUOTE="desertgem, post: 1336780, member: 15199"]I hate to say experience, but that is much of it. Not necessarily in years, but in handling problem coins. get a roll of appropriate coins from a bank, such as lincoln cents, sort them out by wear, and carefully examine the color and wear patterns. Then take a similar coin and try to clean it as gentle as possible and carefully reobserve. Try cleaning with a soft brush, baking soda, salt, vinegar, etc. Keep track of your results and eventually you can spot surface alterations,</p><p><br /></p><p>Retoning almost never fools an experienced coin person. there are many chemicals and processes which can produce a change in color, but 99% of the time, there is a slight variation in the color or distribution . The ways people say they can do it, usually fails above the inexperienced person. Try them with the circulation type coins, as you know what you did to them and you are gaining the ability to detect. No one is perfect, but if you can tell 95% of the time, you will be better than most.</p><p><br /></p><p>It goes to say, that this experimentation should not be done in order to produce a different appearing coins for profit.</p><p><br /></p><p>Jim[/QUOTE]</p><p><br /></p>
[QUOTE="desertgem, post: 1336780, member: 15199"]I hate to say experience, but that is much of it. Not necessarily in years, but in handling problem coins. get a roll of appropriate coins from a bank, such as lincoln cents, sort them out by wear, and carefully examine the color and wear patterns. Then take a similar coin and try to clean it as gentle as possible and carefully reobserve. Try cleaning with a soft brush, baking soda, salt, vinegar, etc. Keep track of your results and eventually you can spot surface alterations, Retoning almost never fools an experienced coin person. there are many chemicals and processes which can produce a change in color, but 99% of the time, there is a slight variation in the color or distribution . The ways people say they can do it, usually fails above the inexperienced person. Try them with the circulation type coins, as you know what you did to them and you are gaining the ability to detect. No one is perfect, but if you can tell 95% of the time, you will be better than most. It goes to say, that this experimentation should not be done in order to produce a different appearing coins for profit. Jim[/QUOTE]
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