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<p>[QUOTE=&quot;Modern Commens, post: 786949, member: 20737&quot;]I&#039;ve been doing some reading about &#039;cleaning&#039; coins. It&#039;s a very interesting topic for collectors. &#039;Cleaning&#039; is mostly not allowed but I was reading something by Halperin that said &#039;dipping&#039; is allowed. If done properly it cannot be detected by the graders. He also said that at some point lots of the older coins have been cleaned. Travers says when discussing cleaning coins: &quot;When performed by someone skilled, however, certain types of cleaning can actually retard some destructive processes and enhance a coin&#039;s appearance.&quot; He also states that immerseing a coin in water does not &#039;eat into&#039; the coin to acheive its effect. He is not the only one I have heard say this, but most say that tap water is not recommended. You should use distilled water. Black tarnish does nothing to ehance the beauty of a silver coin. Even what we call &#039;toning&#039; if not arrested by the proper storage of your coin in a dry, cool, airtight environment will continue to eat away at your coins. I have heard that the professional conservationists use a process called &#039;dripping&#039; to &#039;preserve&#039; the coin. I have been unable to find out anything about how one goes about &#039;dripping&#039;. Does anyone here know how it is done or where I can find more information on it? I have tried to remove some fingerprints from a proof coin I own that were there when I bought it. Big mistake! I had no idea what I was doing. I later foud out about Koinsolv and it can remove prints, or oil from your coin without damaging if done properly. I do know that at some point if you leave a fingerprint on your coin or even a piece of dust, for any length of time it will eventually react negatively with the silver. My local dealer was showing me a fingerprint on a proof coin the other day that he said had been there for many years. The spot was turning an ugly brown.[/QUOTE]</p><p><br /></p>

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