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<p>[QUOTE=&quot;satootoko, post: 106750, member: 669&quot;]The term &quot;dipping&quot; is generally used to refer to the use of a metal polishing chemical, which is not at all the same as acetone rinsing.&nbsp; </p><p><br /></p><p>Dipping compounds are weak acids, and affect the coin metal, removing one or more molecular layers.&nbsp; When the top layer is silver nitrate (tarnish aka &quot;toning&quot;), the coin becomes white.&nbsp; </p><p><br /></p><p>Acetone has no effect on gold or silver.&nbsp; (There is considerable controversey over whether it affects copper/bronze/brass.)&nbsp; It is an organic solvent which attacks pvc residue, the oils present in fingerprints, etc.&nbsp; An acetone rinsed coin is exactly the same metal disk after the rinse that it was before.&nbsp; No metal removal = no damage.[/QUOTE]</p><p><br /></p>

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