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<p>[QUOTE=&quot;Insider, post: 2386447, member: 24314&quot;]Thanks</p><p><br /></p><p>Your post was fast and tasty!</p><p><br /></p><p>I knew reduction was the process.&nbsp; Nevertheless, until I see it actually done in a lab I think the color after the experiment will be &quot;off.&quot;&nbsp; Big difference heating up a nice piece of copper and a hundred year coin with its impurities.&nbsp; It is going to take me awhile to get to a college chemistry lab and prove/disprove my opinion as I don&#039;t have any hydrogen gas here and don&#039;t plan to make any <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie57" alt=":jawdrop:" unselectable="on" unselectable="on" /><img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie52" alt=":hilarious:" unselectable="on" unselectable="on" /><img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie52" alt=":hilarious:" unselectable="on" unselectable="on" /><img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie52" alt=":hilarious:" unselectable="on" unselectable="on" />. </p><p><br /></p><p>Until I do:&nbsp; I just put a micro torch to THE REVERSE of a 1958 cent and heated it until it glowed pink.&nbsp; Then I quenched it in water.&nbsp; Photos coming later.</p><p><br /></p><p>Left: Reverse of another cent that matched the &quot;torched&quot; coin&#039;s original brown color.</p><p>Right: Torched coin&#039;s altered color.&nbsp; Became much lighter (now looks cleaned) w/touch of golden blue-green rim toning).</p><p><br /></p><p>Obverse of torched coin that was face down on a stainless steel hotplate. Now center reddish color with AT bluish field color. </p><p><br /></p><p>No Hydrogen available to really perform experiment BUT the coin did not turn &quot;Black&quot; as the link suggested.&nbsp; Theory is good though, right?&nbsp; Sometimes the actual chemical equation does not match the result! <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie33" alt=":cigar:" unselectable="on" unselectable="on" /></p><p><br /></p><p><a href="mailto:t@Kentucky">[USER=33176]@Kentucky[/USER]</a>, care to run an experiment in your class for us?[/QUOTE]</p><p><br /></p>

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