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<p>[QUOTE=&quot;GDJMSP, post: 1819648, member: 112&quot;]Apparently what you don&#039;t realize Doug is that all of the conservation services dip your coins. That&#039;s the only thing they can do. They mix, match, and dilute various chemicals and then dip your coins in them. Every single one. That&#039;s all a coin dip is - a concoction of chemicals.</p><p><br /></p><p>Now I&#039;ll grant you, a traditional coin dip is nothing but an acid concoction. But that is because if you want to removing toning then an acid is what you must use. It&#039;s the only thing that works.</p><p><br /></p><p>But if there is a foreign substance on a coin, some solvents like acetone or xylene, pure alcohol, or even water, can safely remove that substance - without damaging the coin. But that&#039;s all a solvent can do - remove a foreign substance. They cannot and will not remove toning at all.</p><p><br /></p><p>But there is a danger even in using these &quot;safe&quot; chemicals. That is because you can never know what it is that is on the coin. And you can never know how that substance will react with the chemicals you use. And they must all be used in specific ways if you want to have any hope of success. </p><p><br /></p><p>The chemicals I mention above are considered &quot;safe&quot; because they will not react with the metal of the coin itself. They will do nothing to the metal. But, if there are other chemicals already present on the coin, the chemicals you use can and often will react with those chemicals already on the coin resulting in unpleasant surprises like ugly discoloration or spotting.</p><p><br /></p><p>That is why people choose to use conservation services, because hopefully they know a bit more about it than the average person. But none of it, ever, is risk free. It is always a gamble.[/QUOTE]</p><p><br /></p>

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