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<p>[QUOTE=&quot;desertgem, post: 992689, member: 15199&quot;]The age of the Whitman folder has a lot to do with the inherent damage/advantage of them. The older ones were made of more acidic cardboard, and if stored under dry, low environmental corrosives, could produce nice &quot;album&quot; toning, and whether you like toning ,or not, some were more valuable to others&nbsp; due to the effect. If stored in bad conditions, acid rain type humidity, sulfur coal burning area of country, the toning often raced to corrosion, and the coin had little numismatic value. It is not just Whitman, most folders were the same. Newer manufactured ones are made of paper with less sulfur I have read. I often stored common Lincolns, dimes, etc. that are 3rd or 4th&nbsp; collection in folders, some well over 30 years, and with some care, they are doing fine.</p><p><br /></p><p>Even the Air-Tite holders are not really air tight, nor are slabs--so unless care is used with these also, you will get chemical reaction if you live or store them in the wrong environment.</p><p><br /></p><p>Jim[/QUOTE]</p><p><br /></p>

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