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We have had fluid-preserved specimens on display in our department for over 20 years. They are in older jars of various sizes (mostly over 1 gallon/3.8 L) that have tapered ground-glass stoppers. I first cleaned the jars and stoppers with Alconox (Trisodium
phosphate), then filled them with the specimens and 80% EtoH and applied Dow vacuum grease to the sealing faces (ground parts) of the stoppers and jars. Temperature in that area of the building varies from about 58-80 degrees F annually, and humidity from
65% to about 10% (yes! Philadelphia winters are VERY dry). Leakage so far has been zero.</div>
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<p style="background-color: white;"><span style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: black;">Paul Callomon</span></p>
<p style="background-color: white;"><span style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: black;">Collection Manager, Malacology and General Invertebrates</span></p>
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<p style="background-color: white;"><span style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: black;"><b>Academy of Natural Sciences of Drexel University</b></span></p>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Nhcoll-l <nhcoll-l-bounces@mailman.yale.edu> on behalf of Dirk Neumann <d.neumann@leibniz-lib.de><br>
<b>Sent:</b> Friday, November 10, 2023 9:36 AM<br>
<b>To:</b> nhcoll-l@mailman.yale.edu <nhcoll-l@mailman.yale.edu><br>
<b>Subject:</b> Re: [Nhcoll-l] Effects of fluid preserved specimens on passive environmental systems</font>
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<div class="x_moz-cite-prefix">Hi Bethany,</div>
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<div class="x_moz-cite-prefix">the quality of the seal depends a bit on the (fluctuations of the) temperature; also the evaporation pressure inside the jar would be linked to fluctuating temperatures. If you use denatured ethanol, and if this included MEK (in
Europe), than MEK raises the evaporation pressure. Might be worth to consider recording of any unwanted microclimates that may build up inside the case.</div>
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<div class="x_moz-cite-prefix">Hopefully useful - With best wishes</div>
<div class="x_moz-cite-prefix">Dirk<br>
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<div class="x_moz-cite-prefix">Am 10.11.2023 um 14:09 schrieb Watkins-Colwell, Gregory:<br>
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<p class="x_MsoNormal">I’m not a conservator, but since the ethanol would evaporate before the water, the risk of high humidity seems less than the fear of fire. And even that, you’d probably need to fill the entire display case with ETOH vapor, which may be
far more than could come from the jar(s) on display, for that to be possible. And I’d think that empty jars would be noticed long before things went “boom”.</p>
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<p class="x_MsoNormal">On the other hand, you might worry that the reduced humidity would interfere with the ability of the closure on the jar to seal properly. But that can be worked around, if it’s an issue. A little aquarium sealant could help resolve that.</p>
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<p class="x_MsoNormal">Just my pre-coffee thoughts.</p>
<p class="x_MsoNormal"><br>
Greg</p>
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<p class="x_MsoNormal"><span style="font-size:10.0pt; color:#1F3864">****************</span></p>
<p class="x_MsoNormal"><span style="font-size:10.0pt; color:#2F5496">Gregory J. Watkins-Colwell</span></p>
<p class="x_MsoNormal"><i><span style="font-size:10.0pt; color:#2F5496">Sr. Collection Manager, Herpetology and Ichthyology</span></i></p>
<p class="x_MsoNormal"><i><span style="font-size:10.0pt; color:#2F5496">Division of Vertebrate Zoology</span></i></p>
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<p class="x_MsoNormal"><span style="font-size:10.0pt; color:#2F5496">YALE PEABODY MUSEUM
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<p class="x_MsoNormal"><span style="font-size:10.0pt; color:#2F5496">Main Office: 203-432-3791; West Campus: 203-737-7568; Fax 203-432-9277</span></p>
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<p class="x_MsoNormal"><span style="font-size:10.0pt; color:#1F3864">Package shipping address:</span></p>
<p class="x_MsoNormal"><span style="font-size:10.0pt; color:#2F5496">Greg Watkins-Colwell</span></p>
<p class="x_MsoNormal"><span style="font-size:10.0pt; color:#2F5496">Division of Vertebrate Zoology</span></p>
<p class="x_MsoNormal"><span style="font-size:10.0pt; color:#2F5496">YALE PEABODY MUSEUM OF NATURAL HISTORY</span></p>
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<div style="border:none; border-top:solid #E1E1E1 1.0pt; padding:3.0pt 0in 0in 0in">
<p class="x_MsoNormal"><b>From:</b> Nhcoll-l <a class="x_moz-txt-link-rfc2396E" href="mailto:nhcoll-l-bounces@mailman.yale.edu">
<nhcoll-l-bounces@mailman.yale.edu></a> <b>On Behalf Of </b>Bethany Palumbo<br>
<b>Sent:</b> Friday, November 10, 2023 7:10 AM<br>
<b>To:</b> SPNHC <a class="x_moz-txt-link-rfc2396E" href="mailto:nhcoll-l@mailman.yale.edu">
<nhcoll-l@mailman.yale.edu></a>; <a class="x_moz-txt-link-abbreviated" href="mailto:NATSCA@jiscmail.ac.uk">
NATSCA@jiscmail.ac.uk</a><br>
<b>Subject:</b> [Nhcoll-l] Effects of fluid preserved specimens on passive environmental systems</p>
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<p class="x_MsoNormal">Hi all,</p>
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<p class="x_MsoNormal"> </p>
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<p class="x_MsoNormal">I would like to know if anyone has experienced adverse effects on passive environmental systems from fluid preserved specimens displayed in 70% ethanol. Imagine the scenario that a display case has both fluid-preserved specimens in glass
jars and taxidermy in the same case. I would want to add silica gel in the showcase to maintain a stable humidity for the taxidermy, but would the (30%) water content in the jars affect this? Obviously the quality of the sealant on the jar affects any evaporation
rate, but how sealed is sealed enough? Does anyone know of any research in this specific issue?</p>
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<p class="x_MsoNormal">Advice and experiences would be greatly appreciated!</p>
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<p class="x_MsoNormal"><span class="x_gmailsignatureprefix">-- </span></p>
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<p class="x_MsoNormal"><span style="color:black">Bethany Palumbo, ACR</span></p>
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<p class="x_MsoNormal"><span style="color:black">Head of Conservation Unit</span></p>
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<p class="x_MsoNormal"> </p>
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<p class="x_MsoNormal"><span style="font-family:"Arial",sans-serif; color:black">Statens Naturhistoriske Museum</span></p>
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<p class="x_MsoNormal">Twitter | @bethany_bug</p>
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