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<p>[QUOTE=&quot;GDJMSP, post: 2225934, member: 112&quot;]I believe this is the cable you are talking about - <a href="http://www.google.com/patents/US3145258" target="_blank" class="externalLink ProxyLink" data-proxy-href="http://www.google.com/patents/US3145258" rel="nofollow">http://www.google.com/patents/US3145258</a></p><p><br /></p><p>If you read that you find that even it breaks down to the point that it must eventually be replaced.</p><p><br /></p><p><br /></p><p><br /></p><p>How it happens is because the oil breaks down, degrades, over a period of time. There a couple of chemist who are members here who can explain to you far better than I. How I know it happens is because I have seen it with my own eyes, and over the years there have been more than a few articles written on the subject. Do I have online links to them ? No, but then that is not at all unusual because few magazines allow links to their copyrighted material except for paying subscribes, nor do they maintain availability of online access to copies of their magazines which are more than a year old or two old. At least most don&#039;t. Some do allow you buy online access to old copies though. But unless you have specific information to pin down the exact issue you are looking for, you have little chance of ever finding it.</p><p><br /></p><p>What&#039;s more even the TPGs will refuse to grade coins that have been treated with oils or commercial products that contain oils. That is common knowledge and that information is available on their respective websites.[/QUOTE]</p><p><br /></p>

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