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<p>[QUOTE=&quot;Insider, post: 2511956, member: 24314&quot;]If by &quot;reset&quot; you are posting about the cycle of toned, dipped (reset); toned; dipped...this is a highly inflammatory subject!&nbsp; </p><p><br /></p><p>Actual experiments have been done on fresh original BU 90% silver quarters in a late 1970&#039;s grading seminar.&nbsp; I can say for a fact (I was there) that no changes were observed using a stereo microscope at 10X after almost a dozen PROPER DIPS.&nbsp; </p><p><br /></p><p>In hindsight there was a problem with that experiment.&nbsp; We did not look at the coin using an electron microscope or even the greater than 100X the scope was capable of.&nbsp; </p><p><br /></p><p>There is a bigger problem with that experiment.&nbsp; The surface of the coin had never been allowed to deteriorate by toning.&nbsp; It should be obvious that if the surface of a very darkly toned coin is &quot;etched&quot; beyond repair by one dip; the surface of a lightly toned coin that is dipped and then allowed to tone and dipped again over and over SHOULD be visibly affected after only a few cycles.&nbsp; </p><p><br /></p><p>This experiment should be done BUT I&#039;m not interested as there may be a difference in the result (at the atomic level resulting in different surfaces) if the toning is left to occur naturally over a few years or it is artificially accelerated.[/QUOTE]</p><p><br /></p>

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