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<p class="MsoNormal">I agree with Dirk – your list seems to show lab caps, made to be disposable (and some of them to have needles stuck through them).<o:p></o:p></p>
<p class="MsoNormal">For our screw-top vials (4- and 6-dram) and some small jars (2-ounce) we use phenolic resin caps with polypropylene “coneseal” inserts, and these work very well. A foam (F217) liner as Dirk recommends will also work. Paper or foil liners
are not recommended. <o:p></o:p></p>
<p class="MsoNormal">Note that phenolic caps should not be immersed in alcohol, as they leach into the fluid. However, they are otherwise extremely stable and durable, at least at small (up to 40mm) diameters.<o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom:0in;line-height:normal"><b><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif;color:black">Paul Callomon</span></b><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif;color:black"><br>
<i>Collection Manager, Malacology and General Invertebrates</i><o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:0in;line-height:normal"><b><span style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black">Academy of Natural Sciences of Drexel University, Philadelphia</span></b><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif;color:black"><br>
<i>callomon@ansp.org Tel 215-405-5096 - Fax 215-299-1170</i></span><o:p></o:p></p>
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<b>From:</b> Nhcoll-l <nhcoll-l-bounces@mailman.yale.edu> <b>On Behalf Of </b>Dirk Neumann<br>
<b>Sent:</b> Thursday, February 16, 2023 9:45 AM<br>
<b>To:</b> nhcoll-l@mailman.yale.edu<br>
<b>Subject:</b> Re: [Nhcoll-l] Screw caps for fluid preservation<o:p></o:p></p>
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<p><b><span style="font-family:"Arial",sans-serif;font-variant:small-caps;color:black">External.</span></b><b><span style="font-family:"Arial",sans-serif;font-variant:small-caps"><o:p></o:p></span></b></p>
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<p class="MsoNormal" style="margin-left:.5in">Hi Joosep,<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">I would avoid any silicone and especially rubber inlays. If possible, prefer PE inlays.<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">Also, I am not sure if these Macherey & Nagel vials are designed for long term storage, or for lab use. When in Munich, I inherited different research collections with such lids - and they were mostly deteriorated.<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">Better choose pharmaceutical glassware like those wide-neck jars, e.g. from gerresheimer; these are distributed by many resellers<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"><a href="https://nam10.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.gerresheimer.com%2Fkatalog%2Fprodukte%2Fpharmazeutische-primarverpackungen%2Fflaschen-und-flaschchen-aus-glas%2Fproduktportfolio-europa%2Fflaschen-flaschchen-und-tiegel-aus-behalterglas%2Fweithalsglaser.html&data=05%7C01%7Cprc44%40drexel.edu%7C88e5cbca99d8427eaaa508db102c6978%7C3664e6fa47bd45a696708c4f080f8ca6%7C0%7C0%7C638121555180531792%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=tP98iI%2Ff3Zqys9qYnkIkxER0ysYymYd6DC2MoEMVABM%3D&reserved=0">https://www.gerresheimer.com/katalog/produkte/pharmazeutische-primarverpackungen/flaschen-und-flaschchen-aus-glas/produktportfolio-europa/flaschen-flaschchen-und-tiegel-aus-behalterglas/weithalsglaser.html</a><o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">Hope this helps<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">Dirk<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">Am 16.02.2023 um 14:59 schrieb Joosep Sarapuu:<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">Dear all,<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.5in"> <o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.5in">We are looking for screw caps for vials in fluid perservation collection but there are many choices that are possible to order. Can somebody please suggest which of them are the best for fluid specimen vials?<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.5in"> <o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.5in"><img border="0" width="634" height="492" style="width:6.6041in;height:5.125in" id="Pilt_x0020_1" src="cid:image001.png@01D941EC.32A9B3D0"><img border="0" width="616" height="640" style="width:6.4166in;height:6.6666in" id="Pilt_x0020_2" src="cid:image002.png@01D941EC.32A9B3D0"><o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.5in"> <o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="mso-fareast-language:ET">Sincerely,</span><o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="mso-fareast-language:ET">Joosep Sarapuu</span><o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="mso-fareast-language:ET">Estonian Museum of Natural History</span><o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="mso-fareast-language:ET"> </span><o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="mso-fareast-language:ET"> </span><o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.5in"> <o:p></o:p></p>
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<br>
<o:p></o:p></p>
<pre style="margin-left:.5in">_______________________________________________<o:p></o:p></pre>
<pre style="margin-left:.5in">Nhcoll-l mailing list<o:p></o:p></pre>
<pre style="margin-left:.5in"><a href="mailto:Nhcoll-l@mailman.yale.edu">Nhcoll-l@mailman.yale.edu</a><o:p></o:p></pre>
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<pre style="margin-left:.5in"><o:p> </o:p></pre>
<pre style="margin-left:.5in">_______________________________________________<o:p></o:p></pre>
<pre style="margin-left:.5in">NHCOLL-L is brought to you by the Society for the Preservation of<o:p></o:p></pre>
<pre style="margin-left:.5in">Natural History Collections (SPNHC), an international society whose<o:p></o:p></pre>
<pre style="margin-left:.5in">mission is to improve the preservation, conservation and management of<o:p></o:p></pre>
<pre style="margin-left:.5in">natural history collections to ensure their continuing value to<o:p></o:p></pre>
<pre style="margin-left:.5in">society. See <a href="https://nam10.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.spnhc.org%2F&data=05%7C01%7Cprc44%40drexel.edu%7C88e5cbca99d8427eaaa508db102c6978%7C3664e6fa47bd45a696708c4f080f8ca6%7C0%7C0%7C638121555180688032%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=xAfhEP9Q2iqwnHMCBnCJ18k6ecJN2tRFLVb%2FPuuZ1nI%3D&reserved=0">http://www.spnhc.org</a> for membership information.<o:p></o:p></pre>
<pre style="margin-left:.5in">Advertising on NH-COLL-L is inappropriate.<o:p></o:p></pre>
</blockquote>
<p style="margin-left:.5in"><o:p> </o:p></p>
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-- <o:p></o:p></p>
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<b><span style="font-family:"Source Sans Pro ,sans-serif",serif">****</span></b><o:p></o:p></p>
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<b><span style="font-family:"Source Sans Pro ,sans-serif",serif"> </span></b><o:p></o:p></p>
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<b><span style="font-family:"Source Sans Pro ,sans-serif",serif">Dirk Neumann</span></b><o:p></o:p></p>
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<span style="font-family:"Source Sans Pro ,sans-serif",serif">Collection Manager, Hamburg</span><o:p></o:p></p>
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<span style="font-family:"Source Sans Pro ,sans-serif",serif">Postal address:</span><o:p></o:p></p>
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<b><span style="font-family:"Source Sans Pro ,sans-serif",serif">Museum of Nature Hamburg</span></b><span style="font-family:"Source Sans Pro",sans-serif"><br>
</span>Leibniz Institute for the Analysis<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:0in;margin-left:.5in;line-height:normal">
of Biodiversity Change<o:p></o:p></p>
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<span style="font-family:"Source Sans Pro ,sans-serif",serif">Dirk Neumann</span><o:p></o:p></p>
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<span style="font-family:"Source Sans Pro ,sans-serif",serif">Martin-Luther-King-Platz 3</span><o:p></o:p></p>
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<span style="font-family:"Source Sans Pro ,sans-serif",serif">20146</span><span style="font-family:"Source Sans Pro",sans-serif">
</span><span style="font-family:"Source Sans Pro ,sans-serif",serif">Hamburg</span><span style="font-family:"Source Sans Pro",sans-serif"><br>
+49 </span><span style="font-family:"Source Sans Pro ,sans-serif",serif">40</span><span style="font-family:"Source Sans Pro",sans-serif">
</span><span style="font-family:"Source Sans Pro ,sans-serif",serif">238 3</span><span style="font-family:"Source Sans Pro",sans-serif">17 –
</span><span style="font-family:"Source Sans Pro ,sans-serif",serif">628</span><o:p></o:p></p>
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<u><a href="mailto:d.neumann@leibniz-lib.de">d.neumann@leibniz-lib.de</a></u><o:p></o:p></p>
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Stiftung des öffentlichen Rechts;<br>
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