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<p>[QUOTE=&quot;Pavlos, post: 5166248, member: 96635&quot;]Before putting it in my collection I leave it on my desk for a week or so, so I can observe it everytime I walk past it or I sit at my desk. </p><p><br /></p><p>But, uhm, I never wash it with water, unless it is necessary and then I use distilled water. I guess you only do this ritual for silver coins? For billon and bronze coins I would not do that if I was you, especially with tap water. Also, most paper tissues are acidic, I shouldn&#039;t use these as well.[/QUOTE]</p><p><br /></p>

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