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<p>[QUOTE=&quot;Modern Commens, post: 788326, member: 20737&quot;]Thanks Jim. I read about this in the Travers&#039; book. </p><p>&quot;Nonabrasive cleaning methods are being recommended increasingly before long term storage. One chemical in particular, trichlorotrifluoroethane, was used for years as a degreasing solvent and prized for not leaving a residue on the coin&#039;s surface. Trichlorotrifluoroethane is no longer available because the federal government identifies it as an ozone-destructive solvent and, consequently, has banned it. Preservation experts recommend the use of denatured alcohol in its place&quot;</p><p>The passage also goes on to talk about Dissolve (trichlorotrifluorethane) and the company that produced it which is E &amp; T Kointainer Company. They came up with a substitute product called Koinsolv. I&#039;ve used it. It is okay. Didn&#039;t harm my coins but it does not take away any of the &#039;white spots&#039; that I was hoping to bet rid of. </p><p>Is the Dissolve or trichlorotrifluorethane the same product you were thinking about? </p><p>(By the way I was only half joking about trying to get some in the country.)[/QUOTE]</p><p><br /></p>

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