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<p>[QUOTE=&quot;TomCorona, post: 818683, member: 17621&quot;]Cool Thad. I&#039;m always up for material that is based on science and experience. Good combination. I look forward to picking it up when it comes out. I do wish someone would do one on actual tests, photographs, and the like on different metals with different chemicals. There is so much disinformation regarding &quot;conservation&quot;, it would benefit many folks if there were such a thing. Metal is essentially a chemical. There has to be a better way to &quot;conserve&quot; them via some other chemical component. </p><p>&nbsp;</p><p>I was read David Bower&#039;s book on grading by photographs (excellent book). He acknowledges the &quot;code of silence&quot; associated with conservation, but didn&#039;t expand on it much. I have to say I certainly don&#039;t understand what the big information blockade is all about. Is the &quot;conservation&quot; business that cut throat that a &quot;code of silence&quot; needs to be formed? Is it a closed market or what? Strange aspect of coin collecting IMHO. Maybe your book will enlighten me a bit on some of it. <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie1" alt=":)" unselectable="on" unselectable="on" />[/QUOTE]</p><p><br /></p>

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