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<p>[QUOTE=&quot;cladking, post: 3357444, member: 68&quot;]There&#039;s just no interest in moderns and there&#039;s no interest in the fact that they are all corroding so the coin papers and magazines aren&#039;t printing it.&nbsp; Indeed, Numismatic News (Allen Herbert) used to specifically recommend that the coins be saved in the mint set plastic.&nbsp; </p><p><br /></p><p>It should be assumed all dates are bad but the worst in order are;</p><p>1968</p><p>1970</p><p>1971</p><p>1969</p><p>1974</p><p>1975</p><p>1977</p><p>1976</p><p>1978</p><p>1979</p><p>1965</p><p>1980</p><p>1972</p><p>1981</p><p>1973</p><p>1984</p><p><br /></p><p>Other dates are highly suspect but are probably almost stable.&nbsp;&nbsp; I would suggest stabilizing all coins from these sets in 91% alcohol or acetone and using a different medium for storage.&nbsp;&nbsp; </p><p><br /></p><p>Well stored 1965 sets aren&#039;t too bad but badly stored sets are.&nbsp; 1984 sets are worst for cents.&nbsp;&nbsp; </p><p><br /></p><p>The plastic on the &#039;68 to 81 sets are four layers with thin PVC layers on the inside next to the coin.&nbsp; I believe these were to help seal the pliofilm.[/QUOTE]</p><p><br /></p>

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