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<p>[QUOTE=&quot;messydesk, post: 2247839, member: 1765&quot;]Dipping has a cumulative effect.&nbsp; Every time you dip, a little bit of the coin is stripped away.&nbsp; Where the toning is heavier, more of the coin is stripped away.&nbsp; As this happens the luster is lost, as the luster is created by the microscopic grooves in the coin&#039;s surface that come from metal flow and die wear.&nbsp; I&#039;d illustrate this by first drawing a saw-tooth wave (a bunch of Ws stuck together), representing a cross-section of the metal flow that gives the luster.&nbsp; Next, to simulate dipping knock the tips off the peaks of the saw-tooth wave.&nbsp; Flatter peaks and shallower troughs mean flatter luster.&nbsp; If there is a lot of toning, you&#039;re knocking down more of the peaks.&nbsp; The obverse of your coin already looks dipped, splotches notwithstanding.&nbsp; Dip it again and you&#039;ll lose the negative eye appeal from the toning, but also more of the luster.[/QUOTE]</p><p><br /></p>

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