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<p class="MsoNormal"><span style="font-size:11.0pt;mso-fareast-language:EN-US">Hello all,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;mso-fareast-language:EN-US">I actually did something very similar for my thesis project. I was working with paper shale from Florissant Fossil beds.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;mso-fareast-language:EN-US">My preferred method of stabilizing very thin sheets of shale with fossils on them was to use thicker rice paper with a 15-20% Paraloid or Butvar solution to glue the paper to the
back of the shale piece. I believe I also experimented with Remay, which also worked well.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:"Baskerville Old Face",serif">Heather Ouellette<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt">Research Collections Manager<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt">FAU Harbor Branch<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt">772-224-2206<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif"> Nhcoll-l <nhcoll-l-bounces@mailman.yale.edu>
<b>On Behalf Of </b>Mariana Di Giacomo<br>
<b>Sent:</b> Tuesday, 18 June 2024 6:29 pm<br>
<b>To:</b> Anderson, Gretchen <AndersonG@carnegiemnh.org><br>
<b>Cc:</b> NHCOLL-new <nhcoll-l@mailman.yale.edu><br>
<b>Subject:</b> Re: [Nhcoll-l] Stabilizing cannel coal<o:p></o:p></span></p>
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<p class="MsoNormal"><strong><span style="font-family:"Aptos",sans-serif;color:black">EXTERNAL EMAIL :
</span></strong><span style="color:black">Exercise caution when responding, opening links, or opening attachments.</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:10.0pt">Hi Gretchen,<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt">I agree that using epoxy is a tricky thing, as it will set and then it's (almost) impossible to remove. I like the idea of experimenting with stabilizing the back with Remay or something of the sort and B72.
It all comes down to size. If these are specimens that are not incredibly heavy, then you may very well succeed. Another option could be to prepare a thick B72, so you can "embed" the pieces onto a mold and then cut the mold out (or release it with an acetone
chamber).<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt">I'm happy to continue to chat offline if you want to send me photos.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt">All the best,<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt">Mariana<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt">Mariana Di Giacomo, PhD<br>
Natural History Conservator, Yale Peabody Museum<br>
Associate Editor, Collection Forum, SPNHC<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt">On Tue, Jun 18, 2024, 17:00 Anderson, Gretchen <<a href="mailto:AndersonG@carnegiemnh.org">AndersonG@carnegiemnh.org</a>> wrote:<o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="color:#242424;background:white">Dear Colleagues,
</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="color:#242424;background:white"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="color:#242424;background:white">I just received this question from my vertebrate paleontology department and am looking for thoughts on how to better stabilize
these fragile specimens. The specimens are fragile and some are extremely thin.
</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="color:#242424;background:white"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="color:#242424;background:white">A Research Associate in VP would like to use a </span><span lang="EN-US"><a href="https://www.jbweld.com/product/marineweld-syringe" target="_blank"><span style="border:none windowtext 1.0pt;padding:0cm;background:white">marine
epoxy</span></a><span style="color:#242424;background:white"> to stabilize thin pieces of cannel coal that contain impressions of fossils. His practice is to coat the back of the fossil with a thick layer of the epoxy. He mentioned that this system had been
used at the Field Museum. The specimens are studied by either making a latex peel of them or a CT-scan to yield a positive of the impression. The plan to go forward is to use CT scanning rather than latex peel, when possible. The RA champing at the bit to
stabilize a few specimens. </span><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="color:#242424;background:white"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="color:#242424;background:white">I am concerned about continuing the use of epoxy and would much rather use a method that is more conservation friendly.
I would like to suggest a different way to do this, perhaps using a material like remay or a light carbon steel fabric with Paraloid B-72, lining the back of the fossil to provide improved stability. This would be reversible. We are currently testing this
on some scrap pieces of the coal. </span><span lang="EN-US"><o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="color:#242424;background:white">What are the standards for preparing this kind of fossil? Does anyone have experience with this type of epoxy? If so, how
stable is it?</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="color:#242424;background:white"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="color:#242424;background:white">Any and all advice would be greatly appreciated.
</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="color:#242424;background:white"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="color:#242424;background:white">Thanks!</span><span lang="EN-US"><o:p></o:p></span></p>
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<div id="m_-7883158915194282115Signature">
<p><b><span lang="EN-US" style="font-size:14.0pt">Gretchen Anderson</span></b><span lang="EN-US"><o:p></o:p></span></p>
<p><b><span lang="EN-US" style="font-size:14.0pt">Conservator</span></b><span lang="EN-US"><o:p></o:p></span></p>
<p><b><span lang="EN-US" style="font-size:14.0pt">Carnegie Museum of Natural History</span></b><span lang="EN-US"><o:p></o:p></span></p>
<p><b><span lang="EN-US" style="font-size:14.0pt"><a href="mailto:Andersong@CarnegieMNH.Org">Andersong@CarnegieMNH.Org</a></span></b><span lang="EN-US"><o:p></o:p></span></p>
<p><span lang="EN-US"> <o:p></o:p></span></p>
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