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<p>[QUOTE=&quot;SuperDave, post: 2854613, member: 1892&quot;]Yes, but they&#039;re not always subject to the complete - and individual - coverage of flat album pages during their storage life. Some are partially covered, leading to the &quot;crescent&quot; toning we see on Morgans. Some are completely covered, and tone from the outside in like coins from an album. Either way, the overwhelming majority of them receive their sulfur from the atmosphere around them, rather than direct contact with the physical source of that sulfur.[/QUOTE]</p><p><br /></p>

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