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<p>[QUOTE=&quot;desertgem, post: 725027, member: 15199&quot;]A significant addition to Carls statement is that the acetone and water were not mixed, the water was in the form of water vapor ( up to 50% as I recall), and the copper was pure foil , and I doubt if it had formed any patina. They also said that acetic acid formation was slow to form. The experiment was done in 2000 and published in 2001, mainly for the copper industry saying that acetone is not a good degreaser substance. </p><p><br /></p><p>Scientists constantly see such claims against established standards and methods, and further experiments don&#039;t seem to have occurred, ( I am not completely sure of this as since retirement, I don&#039;t have the subscriptions to the journals full paper, just abstracts).</p><p><br /></p><p>Now I have to explain to my &quot;good coins&quot; why they have to be in the dark the rest of their lives!<img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie8" alt=":D" unselectable="on" unselectable="on" /> </p><p><br /></p><p>Acetone Jim[/QUOTE]</p><p><br /></p>

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