<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><meta http-equiv="Content-Type" content="text/html; charset=us-ascii"><meta name="Generator" content="Microsoft Word 14 (filtered medium)"><style><!--/* Font Definitions */@font-face {font-family:Calibri; panose-1:2 15 5 2 2 2 4 3 2 4;}@font-face {font-family:Tahoma; panose-1:2 11 6 4 3 5 4 4 2 4;}/* Style Definitions */p.MsoNormal, li.MsoNormal, div.MsoNormal {margin:0in; margin-bottom:.0001pt; font-size:12.0pt; font-family:"Times New Roman","serif";}a:link, span.MsoHyperlink {mso-style-priority:99; color:blue; text-decoration:underline;}a:visited, span.MsoHyperlinkFollowed {mso-style-priority:99; color:purple; text-decoration:underline;}span.EmailStyle17 {mso-style-type:personal-reply; font-family:"Calibri","sans-serif"; color:#1F497D;}..MsoChpDefault {mso-style-type:export-only; font-family:"Calibri","sans-serif";}@page WordSection1 {size:8.5in 11.0in; margin:1.0in 1.0in 1.0in 1.0in;}div.WordSection1 {page:WordSection1;}--></style><!--[if gte mso 9]><xml><o:shapedefaults v:ext="edit" spidmax="1026" /></xml><![endif]--><!--[if gte mso 9]><xml><o:shapelayout v:ext="edit"><o:idmap v:ext="edit" data="1" /></o:shapelayout></xml><![endif]--></head><body lang="EN-US" link="blue" vlink="purple">I have found that ISO propanol works well. Simon<br><br>Sent from my HTC<br><br><div id="htc_header" style="">----- Reply message -----<br>From: "Ann M Molineux" <annm@austin.utexas.edu><br>Date: Tue, Jan 29, 2013 17:02<br>Subject: [Nhcoll-l] Aged Shellac<br>To: "angie thompson" <angie.c.thompson@gmail.com>, "nhcoll-l@mailman.yale.edu" <nhcoll-l@mailman.yale.edu>, "PaleoNet@nhm.ac.uk" <PaleoNet@nhm.ac.uk><br><br></div>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Please can you reply to the list to Angie’s query about shellac removal of historically collected ‘shelly’ materials in our collections (mainly molluscs, arthropods
and echinoderms). Our real problems are the seeming lack of controlled experiments with helpful detailed methods and results which would allow us to do some meaningful tests. We have had the components of our ‘shellac’ tested (with many thanks to Julian Carter
in Wales) and have a pretty good notion of the range of adhesives used.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497D">This ‘shellac’ technique was used on our historic material and not something that has been practiced here, probably since the early twentieth century. So the
specimens in question have been in the collection for over a hundred years.. The matrix of Paleogene/Neogene is often friable and we suspect that may have been one of the reasons that shellac coating was adopted in the first place, they were never display specimens.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497D">We are interested in your experiences with this problem and would appreciate any recommendations.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Many thanks<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Ann<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Ann Molineux, PhD<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Curator and Collection Manager<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Non-vertebrate Paleontology, Texas Natural Science Center<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Calibri","sans-serif";color:#1F497D">The University of Texas at Austin<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Phone: 512-232-5384 (lab): Phone: 512-791-5521 (cell)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Location: Bldg 122, J.J.Pickle Research Campus, 10100 Burnet Rd, Austin, TX78758<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><a href="http://www.utexas.edu/tmm/npl"><span style="color:blue">http://www.utexas.edu/tmm/npl</span></a> &
<a href="http://www.paleocentral.org/"><span style="color:blue">http://www.paleocentral.org</span></a></span><span style="font-size:9.0pt;font-family:"Calibri","sans-serif";color:#1F497D">
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> nhcoll-l-bounces@mailman.yale.edu [mailto:nhcoll-l-bounces@mailman.yale.edu]
<b>On Behalf Of </b>angie thompson<br>
<b>Sent:</b> Tuesday, January 29, 2013 9:15 AM<br>
<b>To:</b> nhcoll-l@mailman.yale.edu<br>
<b>Subject:</b> [Nhcoll-l] Aged Shellac<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">Hi all<o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">I'm looking at removing some very old 'shellac' from specimens. The shellac is about 80-100 yrs old, and has turned dark amber. This collection of specimens were covered in resin mix of sandrac and copal. In
some cases, we're seeing the shellac get brittle and fracture, damaging the surface underneath it. Has anyone has success at aged shellac removal?
<o:p></o:p></p>
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<p class="MsoNormal">Thanks<br>
Angie Thompson<o:p></o:p></p>
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<p class="MsoNormal">UT<o:p></o:p></p>
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