<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 12 (filtered medium)">
<style><!--
/* Font Definitions */
@font-face
{font-family:"MS Mincho";
panose-1:2 2 6 9 4 2 5 8 3 4;}
@font-face
{font-family:"MS Mincho";
panose-1:2 2 6 9 4 2 5 8 3 4;}
@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;}
@font-face
{font-family:"\@MS Mincho";
panose-1:2 2 6 9 4 2 5 8 3 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0cm;
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;}
p
{mso-style-priority:99;
mso-margin-top-alt:auto;
margin-right:0cm;
mso-margin-bottom-alt:auto;
margin-left:0cm;
font-size:12.0pt;
font-family:"Times New Roman","serif";}
p.MsoAcetate, li.MsoAcetate, div.MsoAcetate
{mso-style-priority:99;
mso-style-link:"Balloon Text Char";
margin:0cm;
margin-bottom:.0001pt;
font-size:8.0pt;
font-family:"Tahoma","sans-serif";}
span.BalloonTextChar
{mso-style-name:"Balloon Text Char";
mso-style-priority:99;
mso-style-link:"Balloon Text";
font-family:"Tahoma","sans-serif";}
span.EmailStyle20
{mso-style-type:personal;
font-family:"Calibri","sans-serif";
color:#1F497D;}
span.EmailStyle21
{mso-style-type:personal-reply;
font-family:"Calibri","sans-serif";
color:#1F497D;}
.MsoChpDefault
{mso-style-type:export-only;
font-size:10.0pt;}
@page WordSection1
{size:612.0pt 792.0pt;
margin:72.0pt 72.0pt 72.0pt 72.0pt;}
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">
<div class="WordSection1">
<div>
<div style="border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm">
<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""> Paul Callomon
<br>
<b>Sent:</b> Tuesday, January 29, 2013 11:07 AM<br>
<b>To:</b> 'angie thompson'<br>
<b>Subject:</b> RE: [Nhcoll-l] Aged Shellac<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Hi Angie<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Fossils are tricky, as whatever solvent you use will be absorbed by the matrix. If you want to try anyway, I’d suggest using alcohol (methanol, ethanol or isopropanol)
and toothbrushes. Brush some alcohol onto the surface, then absorb it off immediately with paper towels before it gets a chance to evaporate, so the fluid comes off the specimen and not into it. Repeat until the shellac is gone.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">As with any treatment like this, though, try it on a sacrificial specimen first. Don’t use water – it’ll get into the matrix and can cause cracking and spalling.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="color:#1F497D">Paul Callomon<o:p></o:p></span></b></p>
<p class="MsoNormal"><span style="color:#1F497D">Collections Manager in Malacology, Invertebrate Paleontology and General Invertebrates<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-top:4.0pt"><span style="font-variant:small-caps;color:#1F497D">The Academy of Natural Sciences of Drexel University<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">1900 Benjamin Franklin Parkway<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Philadelphia, PA 19103<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><a href="mailto:callomon@ansp.org">callomon@ansp.org</a><o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Tel. 215-405-5096<o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto"><span style="color:#1F497D">ansp.org<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black">Follow us:</span><span style="color:#1F497D">
<a href="http://www.facebook.com/AcademyofNaturalSciences" title="http://www.facebook.com/AcademyofNaturalSciences">
Facebook</a> | <a href="http://twitter.com/#!/AcadNatSci" title="http://twitter.com/#!/AcadNatSci">
Twitter</a><o:p></o:p></span></p>
<p class="MsoNormal"><b><span style="color:#1F497D">Join us as we celebrate the Academy’s 200th anniversary with a year of exciting events, special programs, and our bicentennial exhibit,
<i>The Academy at 200: The Nature of Discovery</i>. <a href="http://www.ansp.org">
www.ansp.org</a><o:p></o:p></span></b></p>
</div>
</body>
</html>