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<p>[QUOTE=&quot;Just Carl, post: 518688, member: 4552&quot;]Not necessarily so. Fingerprints contain oils as well as acids. Some are more acidic than others. Some of the acids are different also. Some will start to slowly effect the coins and others will do nothing. All depends on the air present, moisture present, temperature in the areas. </p><p>I suggest if you plan on keeping those coins for a really long time you dip them in Acetone, then distilled water, carefully blot with a cotton cloth. After complete drying, then place in the 2x2&#039;s. </p><p>Usually seal the ends with a clear tape instead of the staple method. Helps keep out moisture. </p><p>for proper methods of the use of Acetone, use a search for Acetone on this or any coin forum.[/QUOTE]</p><p><br /></p>

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