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<p>[QUOTE=&quot;Lehigh96, post: 447623, member: 15309&quot;]A fantastic question.&nbsp; I have to admit that I don&#039;t really know the science behind the toning rate for dipped coins.&nbsp; I will say that the oxide layer that forms on metals can form a protective barrier against corrosion.&nbsp; If the oxide layer is completely removed as it is with a dip, it would only make sense that the dipped coin would tone at a quicker rate initially than the undipped coin that already has an oxide layer on the surface.&nbsp; At what point this would even out would be a great topic to research.[/QUOTE]</p><p><br /></p>

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