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<p>[QUOTE=&quot;TypeCoin971793, post: 2427434, member: 78244&quot;]Sure, you can say that. Some of the thickest patinas are about 1000nm, but I would estimate the depth of the patina on this coin to be about 200-500nm, based on the color of the lustrous areas. To put this into perspective, a patina of 1000nm is the same thickness as a sliver of wood from a meterstick that is 1/1000th of a millimeter thick. The corrosion is so microscopically thin that it does not have any appreciable effect on the surface of the coin.[/QUOTE]</p><p><br /></p>

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