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<p>[QUOTE=&quot;desertgem, post: 1308596, member: 15199&quot;]Just as a scientific observation:</p><p><br /></p><p><br /></p><p><br /></p><p>Have a problem in that coin metals have a coefficient of expansion/contraction such that the metal contracts in cold, so the pores would close more before the water reached freezing. And then there is a problem with water as the maximum density is reached at 4 degree cent. ( contraction to there) and then expand again below 4 degrees C. ,as in a freezer. So I can not see how this process would actually do that.</p><p><br /></p><p>As an aside, I recently rescued a hard drive that had a problem booting by freezing the drive in a zip lock and then firing it up. The cold caused shrinking of the disc and concentrated the sectors just enough to boot. I then saved the data.</p><p><br /></p><p>Also specific gravity determinations are suppose to be done in 4 degree C, water as a standard density ( in case you try the process).</p><p><br /></p><p>JIm[/QUOTE]</p><p><br /></p>

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