<html><head>
<meta name="Generator" content="Micro Focus GroupWise Web">
</head><body><div id="GroupWiseSection_1664201904912_Joachim.Haendel@zns.uni-halle.de_659232D005F00000BEC929790EDC4731_" class="GroupWiseMessageBody">
<div>Hello all,</div>
<div> </div>
<div>
<p>There is a study on mold on paper. (University of applied sciences and art Hildesheim, Study of Conservation and Restoration)<br>It says that <strong>70% ethanol must be used</strong>, </p>
<p>The 30% water content transports the alcohol into the fungal cell, the proteins in the membrane are denatured and the metabolism of the molds is prevented.<br>With higher percentage alcohol (> 70%), the water concentration is too low for transport into the cell.</p>
<p>It was also shown that spraying with 70 % alcohol does not work. Apparently, the alcohol evaporates too quickly to enter the cells. At worst, additional mold growth may even occur due to the high water content. A bath in 70% alcohol was most effective.</p>
<p>As I said - the study refers to mold on paper, but probably also applies to bones or e.g. insect specimens.</p>
<p>Good luck<br>Joachim</p>
</div>
<div id="GWSignatureSent" class="mceNonEditable" style="display: block; -webkit-user-select: none; user-select: none;">
<div><span style="color: #949494; font-family: Arial, sans-serif; font-size: small;"> </span></div>
<div><span style="color: #949494; font-family: Arial, sans-serif; font-size: small;">-- </span></div>
<div><span style="color: #949494; font-family: Arial, sans-serif; font-size: small;">Joachim Haendel</span></div>
<div><span style="color: #949494; font-family: Arial, sans-serif; font-size: small;"> </span></div>
<span style="color: #949494; font-family: Arial, sans-serif; font-size: small;">Center of Natural Sciences Collections<br>of the Martin Luther University<br>- Entomological Collection -<br><br>Domplatz 4<br>D-06099 Halle (Saale)<br>Germany<br><br>Phone: +49 345 - 55 26 447<br>Fax: +49 345 - 55 27 248<br></span>
<div><span style="color: #949494; font-family: Arial, sans-serif; font-size: small;">Email: joachim.haendel@zns.uni-halle.de</span></div>
<div> </div>
<div> </div>
</div>
</div>
<div id="GroupWiseSection_1664201904798_Joachim.Haendel@zns.uni-halle.de_659232D005F00000BEC929790EDC4731_" class="GroupWiseMessageBody"><span class="GroupwiseReplyHeader"><br>>>> Simon Moore <couteaufin@btinternet.com> 20.09.2022, 18:12 >>><br></span>Hi Chris,<br><br>You’ll probably get many responses over this. <br><br>If the shells are robust enough, then a light spray with 70% ethanol will loosen and neutralise the mould so that it can be wiped away but if it has somewhat destabilised the scute layers, then it will be cotton buds dipped in alcohol. Once the scutes are dry and clean, then a light dressing with something like 10% (emulsion of) Optimalin will prevent the scutes from drying and delaminating. Bear in mid that Optimalin is an oil used in taxidermy but is much too sticky per se, hence the reason I dilute it. The water then slowly evaporates away allowing the oil to penetrate just far enough into the organic layers without leaving a sticky and dust-attractant residue.<br><br>With all good wishes, Simon<br><br>Simon Moore MIScT, RSci, FLS, ACR<br>Conservator of Natural Sciences and Cutlery Historian,<br><br>www.natural-history-conservation.com<br><br><br>> On 20 Sep 2022, at 16:32, Chris Evelyn <christopher_evelyn@ucsb.edu> wrote:<br>> <br>> Hello all,<br>> <br>> We have a pretty serious mold issue. Everything in the room has some mold. The jars and surfaces can be cleaned but a few items are trickier so I'd love some feedback:<br>> <br>> 1) Skeletal specimens (will 10% bleach solution work?)<br>> 2) taxidermy specimens (will 10% bleach work?)<br>> 3) cardboard boxes with small specimens (replace the boxes or just clean them off?) I<br>> <br>> Attached are some images of the current situation.<br>> <br>> Thank you for your assistance!<br>> <br>> Chris<br>> <br>> Christopher J. Evelyn<br>> Vertebrate Curatorial Manager & Asst. Researcher<br>> Cheadle Center for Biodiversity and Ecological Restoration<br>> University of California Santa Barbara<br>> Ancestral Lands of the Coastal Band of the Chumash Nation<br>> <turtle shell mold.JPG><Turtle taxidermy mold.JPG><Turtle_skull_mold.JPG>_______________________________________________<br>> Nhcoll-l mailing list<br>> Nhcoll-l@mailman.yale.edu<br>> https://mailman.yale.edu/mailman/listinfo/nhcoll-l<br>> <br>> _______________________________________________<br>> NHCOLL-L is brought to you by the Society for the Preservation of<br>> Natural History Collections (SPNHC), an international society whose<br>> mission is to improve the preservation, conservation and management of<br>> natural history collections to ensure their continuing value to<br>> society. See http://www.spnhc.org for membership information.<br>> Advertising on NH-COLL-L is inappropriate.<br><br>_______________________________________________<br>Nhcoll-l mailing list<br>Nhcoll-l@mailman.yale.edu<br>https://mailman.yale.edu/mailman/listinfo/nhcoll-l<br><br>_______________________________________________<br>NHCOLL-L is brought to you by the Society for the Preservation of<br>Natural History Collections (SPNHC), an international society whose<br>mission is to improve the preservation, conservation and management of<br>natural history collections to ensure their continuing value to<br>society. See http://www.spnhc.org for membership information.<br>Advertising on NH-COLL-L is inappropriate.</div></body></html>