There is a member of our mineral club that has copper specimens he is trying to keep from oxidizing. I gave him the article written by Evan M. Johnson. He does not want to coat his specimens with any polymers or such. I was giving this some thought, and came up with an idea I would like to run by Mindat members. What if you placed the specimen in a glass or plastic specimen container and then filled the container with carbon dioxide. CO2, being heavier than O2 would displace it. If you then seal the container, would this not work. Are there any reactions of copper to CO2. Thanks in advance. http://www.mindat.org/forum.php?read,19,254828,254828#msg-254828 Sat, 25 May 2013 10:45:38 +0000 Phorum 5.2.15a http://www.mindat.org/forum.php?read,19,254828,261780#msg-261780 http://www.mindat.org/forum.php?read,19,254828,261780#msg-261780 Peter Haas Mineral Cleaning and Preparation Sat, 26 May 2012 04:25:08 +0000 http://www.mindat.org/forum.php?read,19,254828,260082#msg-260082 http://www.mindat.org/forum.php?read,19,254828,260082#msg-260082 Paul Brandes Mineral Cleaning and Preparation Mon, 07 May 2012 01:02:55 +0000 http://www.mindat.org/forum.php?read,19,254828,259045#msg-259045 http://www.mindat.org/forum.php?read,19,254828,259045#msg-259045 Andy Klotz Mineral Cleaning and Preparation Wed, 25 Apr 2012 13:00:39 +0000 http://www.mindat.org/forum.php?read,19,254828,254963#msg-254963 http://www.mindat.org/forum.php?read,19,254828,254963#msg-254963 EMJ]]> Evan Johnson Mineral Cleaning and Preparation Sun, 11 Mar 2012 13:49:11 +0000 http://www.mindat.org/forum.php?read,19,254828,254940#msg-254940 http://www.mindat.org/forum.php?read,19,254828,254940#msg-254940 Rock Currier Mineral Cleaning and Preparation Sun, 11 Mar 2012 07:49:22 +0000 http://www.mindat.org/forum.php?read,19,254828,254828#msg-254828 http://www.mindat.org/forum.php?read,19,254828,254828#msg-254828 Gary Parisi Mineral Cleaning and Preparation Fri, 09 Mar 2012 18:12:44 +0000