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<p>[QUOTE=&quot;GDJMSP, post: 3458778, member: 112&quot;]There&#039;s something very basic that one needs to understand about verdigris, that being exactly what verdigris is. Simply put, verdigris is what copper turns into as the metal itself corrodes. </p><p><br /></p><p>Another way of putting it would be this - verdigris is to copper as rust is to iron and steel. As iron or steel corrodes the metal itself turns into rust - it is no longer metal at all. And as copper corrodes it turns into verdigris - and it is no longer metal at all. It is important to understand this basic concept because it helps one also understand what it takes to remove the verdigris from copper. </p><p><br /></p><p>For example, if you took a piece of steel that had some rust on it and put it into some liquid, lets say acetone, would the acetone remove that rust ? It might remove some of it, but only portions of it that are flaky and loosely attached. The rest would stay right there on the steel. In other words it wouldn&#039;t really matter what the liquid was, any liquid would do the same thing. The same kind of thing applies to verdigris and copper. If you put copper that has some verdigris on it in acetone, some of the loose and flaky, or powdery, verdigris might come away, but immersing the copper into any liquid would the same thing. In other words it&#039;s only coming away because it&#039;s loosely attached to the copper. The acetone is having no chemical reaction, it is not dissolving the verdigris.</p><p><br /></p><p>The point I&#039;m trying to get across is that trying to remove verdigris with acetone, distilled water, or xylene, is a waste of time as none of those 3 things will dissolve verdigris. </p><p><br /></p><p>The one and only thing that will not harm a coin, but will dissolve verdigris and and actually remove it from a coin is Verdi-Care. There is no other chemical or product out there that will dissolve verdigris and not harm the coin. </p><p><br /></p><p>It should also be remembered that even the guy who invented and makes Verdi-Care will tell you that it will not always remove ALL of the verdigris. It typically works best when the verdigris is light and not too terribly old. And I&#039;m pointing this out because in some cases, particularly when verdigris has been on a coin for a long, long time and grown thick, it can become quite hard and the Verdi-Care will not remove all of it. Simply put the lighter the verdigris is the better it will work. The older and thicker it is the less likely it will work to remove all of it. It will remove some, but not necessarily all of it.[/QUOTE]</p><p><br /></p>

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