<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=utf-8"><meta name=Generator content="Microsoft Word 15 (filtered medium)"><!--[if !mso]><style>v\:* {behavior:url(#default#VML);}
o\:* {behavior:url(#default#VML);}
w\:* {behavior:url(#default#VML);}
.shape {behavior:url(#default#VML);}
</style><![endif]--><style><!--
/* Font Definitions */
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:DengXian;
panose-1:2 1 6 0 3 1 1 1 1 1;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:Aptos;
panose-1:2 11 0 4 2 2 2 2 2 4;}
@font-face
{font-family:"Times New Roman \(Hoofdtekst CS\)";
panose-1:2 11 6 4 2 2 2 2 2 4;}
@font-face
{font-family:Consolas;
panose-1:2 11 6 9 2 2 4 3 2 4;}
@font-face
{font-family:"Source Sans Pro";
panose-1:2 11 5 3 3 4 3 2 2 4;}
@font-face
{font-family:"\@DengXian";
panose-1:2 1 6 0 3 1 1 1 1 1;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin-top:0cm;
margin-right:0cm;
margin-bottom:8.0pt;
margin-left:0cm;
line-height:106%;
font-size:11.0pt;
font-family:"Calibri",sans-serif;}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
pre
{mso-style-priority:99;
mso-style-link:"HTML - vooraf opgemaakt Char";
margin-top:0cm;
margin-right:0cm;
margin-bottom:8.0pt;
margin-left:0cm;
line-height:106%;
font-size:10.0pt;
font-family:"Courier New";}
span.HTML-voorafopgemaaktChar
{mso-style-name:"HTML - vooraf opgemaakt Char";
mso-style-priority:99;
mso-style-link:"HTML - vooraf opgemaakt";
font-family:"Consolas",serif;}
.MsoChpDefault
{mso-style-type:export-only;
font-size:10.0pt;
mso-ligatures:none;}
@page WordSection1
{size:595.3pt 841.9pt;
margin:70.85pt 70.85pt 2.0cm 70.85pt;}
div.WordSection1
{page:WordSection1;}
--></style></head><body lang=NL link=blue vlink="#954F72" style='word-wrap:break-word'><div class=WordSection1><p class=MsoNormal><span lang=EN-US style='font-size:12.0pt;line-height:106%;mso-fareast-language:EN-US'>Dear Lennart,<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:12.0pt;line-height:106%;mso-fareast-language:EN-US'>You might also opt for rubber gaskets made EPDM (ethylene-propylene-diene-monomer). For several decades they are successfully used for sealing bail jars at Naturalis Leiden-NL.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:12.0pt;line-height:106%;mso-fareast-language:EN-US'>Kind regards,<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:12.0pt;line-height:106%;mso-fareast-language:EN-US'>Dries</span><span style='font-size:12.0pt;line-height:106%'><o:p></o:p></span></p><p class=MsoNormal style='margin-bottom:0cm;line-height:normal'><span style='color:black;mso-fareast-language:EN-US'>--<o:p></o:p></span></p><p class=MsoNormal style='margin-bottom:0cm;line-height:normal'><span style='color:black;mso-fareast-language:EN-US'>Andries J. van Dam (director)<br><br>Alcomon Company<br>Leliestraat 54<br>2313BH Leiden<br>Netherlands<br><br>Tel: +31615676299<br>E-mail: <u><a href="mailto:ajvandam@alcomon.com"><span style='color:#0563C1'>ajvandam@alcomon.com</span></a> <br></u>Website: <u><a href="http://www.alcomon.com/"><span style='color:#0563C1'>http://www.alcomon.com</span></a><o:p></o:p></u></span></p><p class=MsoNormal style='margin-bottom:0cm;line-height:normal'><span style='mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal style='margin-bottom:0cm;line-height:normal'><img border=0 width=181 height=41 style='width:1.8854in;height:.427in' id="Afbeelding_x0020_1" src="cid:image001.jpg@01DC5A34.F1800350" alt=AlcomonLogo><span style='font-size:12.0pt'><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:12.0pt;line-height:106%;mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:12.0pt;line-height:106%;mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:12.0pt;line-height:106%;mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:12.0pt;line-height:106%;mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='mso-fareast-language:EN-US'><o:p> </o:p></span></p><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span style='color:black'>Van: </span></b><span style='color:black'>Nhcoll-l <nhcoll-l-bounces@mailman.yale.edu> namens Dirk Neumann <d.neumann@leibniz-lib.de><br><b>Datum: </b>donderdag 20 november 2025 om 14:52<br><b>Aan: </b><nhcoll-l@mailman.yale.edu><br><b>Onderwerp: </b>Re: [Nhcoll-l] [EXTERN] Material of rubber seal</span><span style='font-size:12.0pt;line-height:106%;color:black'><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-family:"Aptos",sans-serif'><o:p> </o:p></span></p></div><div><p class=MsoNormal>Hi Lennart,<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>if you refer to Le-Perfait gaskets, the baseline should be<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Replacement gaskets should be made of a durable but elastic synthetic material such as neoprene or Buna-N (acrylonitrile butadiene rubber, also called nitrile).<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>For Europe, there seems to be a vendor in Switzerland (Fabian do you have more details?)<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>With best wishes<o:p></o:p></p></div><div><p class=MsoNormal>Dirk<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Am 20.11.2025 um 14:41 schrieb Lennart Lennuk:<o:p></o:p></p></div><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Hi!<br><br>What material should collection storage rubber seals are of?<br>They should be archival quality, non-acid off-gassing.<o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='mso-fareast-language:ET'>Lennart Lennuk</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='mso-fareast-language:ET'>Head of collections</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='mso-fareast-language:ET'>Estonian Museum of Natural History</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='mso-fareast-language:ET'>00372 5656 9916</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='mso-fareast-language:ET'><a href="mailto:Lennart.lennuk@loodusmuuseum.ee">Lennart.lennuk@loodusmuuseum.ee</a></span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div></div><p class=MsoNormal><br><br><o:p></o:p></p><pre>_______________________________________________<o:p></o:p></pre><pre>Nhcoll-l mailing list<o:p></o:p></pre><pre><a href="mailto:Nhcoll-l@mailman.yale.edu">Nhcoll-l@mailman.yale.edu</a><o:p></o:p></pre><pre><a href="https://mailman.yale.edu/mailman/listinfo/nhcoll-l">https://mailman.yale.edu/mailman/listinfo/nhcoll-l</a><o:p></o:p></pre><pre><o:p> </o:p></pre><pre>_______________________________________________<o:p></o:p></pre><pre>NHCOLL-L is brought to you by the Society for the Preservation of<o:p></o:p></pre><pre>Natural History Collections (SPNHC), an international society whose<o:p></o:p></pre><pre>mission is to improve the preservation, conservation and management of<o:p></o:p></pre><pre>natural history collections to ensure their continuing value to<o:p></o:p></pre><pre>society. See <a href="http://www.spnhc.org">http://www.spnhc.org</a> for membership information.<o:p></o:p></pre><pre>Advertising on NH-COLL-L is inappropriate.<o:p></o:p></pre></blockquote><p><o:p> </o:p></p><div><p class=MsoNormal style='margin-bottom:0cm;line-height:normal'>-- <span style='font-size:12.0pt;font-family:"Aptos",sans-serif'><o:p></o:p></span></p><p class=MsoNormal style='margin-bottom:0cm;line-height:normal'><b><span lang=EN-US style='font-family:"Source Sans Pro",sans-serif'>****</span></b><o:p></o:p></p><p class=MsoNormal style='margin-bottom:0cm;line-height:normal'><b><span lang=EN-US style='font-family:"Source Sans Pro",sans-serif'> </span></b><o:p></o:p></p><p class=MsoNormal style='margin-bottom:0cm;line-height:normal'><b><span lang=EN-US style='font-family:"Source Sans Pro",sans-serif'>Dirk Neumann</span></b><o:p></o:p></p><p class=MsoNormal style='margin-bottom:0cm;line-height:normal'><span lang=EN-US style='font-family:"Source Sans Pro",sans-serif'>Collection Manager, Hamburg</span><o:p></o:p></p><p class=MsoNormal style='margin-bottom:0cm;line-height:normal'><span lang=EN-US style='font-family:"Source Sans Pro",sans-serif'> </span><o:p></o:p></p><p class=MsoNormal style='margin-bottom:0cm;line-height:normal'><span lang=EN-US style='font-family:"Source Sans Pro",sans-serif'>Postal address:</span><o:p></o:p></p><p class=MsoNormal style='margin-bottom:0cm;line-height:normal'><b><span lang=EN-US style='font-family:"Source Sans Pro",sans-serif'>Museum of Nature Hamburg</span></b><span lang=EN-US style='font-family:"Source Sans Pro",sans-serif'><br><span style='color:#008669'>Leibniz Institute for the Analysis</span></span><o:p></o:p></p><p class=MsoNormal style='margin-bottom:0cm;line-height:normal'><span style='font-family:"Source Sans Pro",sans-serif;color:#008669'>of Biodiversity Change</span><o:p></o:p></p><p class=MsoNormal style='margin-bottom:0cm;line-height:normal'><span style='font-family:"Source Sans Pro",sans-serif'>Dirk Neumann</span><o:p></o:p></p><p class=MsoNormal style='margin-bottom:0cm;line-height:normal'><span style='font-family:"Source Sans Pro",sans-serif'>Martin-Luther-King-Platz 3</span><o:p></o:p></p><p class=MsoNormal style='margin-bottom:0cm;line-height:normal'><span style='font-family:"Source Sans Pro",sans-serif'>20146 Hamburg<br>+49 40 238 317 – 628</span><o:p></o:p></p><p class=MsoNormal style='margin-bottom:0cm;line-height:normal'><u><span style='font-family:"Source Sans Pro",sans-serif;color:blue'><a href="mailto:d.neumann@leibniz-lib.de">d.neumann@leibniz-lib.de</a></span></u><o:p></o:p></p><p class=MsoNormal style='margin-bottom:0cm;line-height:normal'><a href="imap://dneumann@webmail.leibniz-lib.de:993/fetch%3EUID%3E/INBOX/Privat/www.leibniz-lib.de"><span style='font-family:"Source Sans Pro",sans-serif'>www.leibniz-lib.de</span></a><o:p></o:p></p><p class=MsoNormal style='margin-bottom:0cm;line-height:normal'><span style='font-size:10.0pt;font-family:"Source Sans Pro",sans-serif'> </span><o:p></o:p></p><p class=MsoNormal style='margin-bottom:0cm;line-height:normal'><span style='font-size:10.0pt;font-family:"Source Sans Pro",sans-serif'>-- <br>Stiftung Leibniz-Institut zur Analyse des Biodiversitätswandels<br>Postanschrift: Adenauerallee 127, 53113 Bonn, Germany<br><br>Stiftung des öffentlichen Rechts;<br>Generaldirektion: Prof. Dr. Bernhard Misof (Generaldirektor), Adrian Grüter (Kaufm. Geschäftsführer)<br>Sitz der Stiftung: Adenauerallee 160 in Bonn<br>Vorsitzender des Stiftungsrates: Dr. Michael Wappelhorst</span><o:p></o:p></p><p class=MsoNormal><span style='font-size:10.0pt;line-height:106%;font-family:"Source Sans Pro",sans-serif'> </span><o:p></o:p></p></div><p class=MsoNormal style='margin-bottom:0cm;line-height:normal'><span style='font-size:12.0pt;font-family:"Aptos",sans-serif'>-- <br>Stiftung Leibniz-Institut zur Analyse des Biodiversitätswandels<br>Postanschrift: Adenauerallee 127, 53113 Bonn, Germany<br><br>Stiftung des öffentlichen Rechts;<br>Generaldirektion: Prof. Dr. Bernhard Misof (Generaldirektor), Adrian Grüter (Kaufm. Geschäftsführer)<br>Sitz der Stiftung: Adenauerallee 160 in Bonn<br>Vorsitzender des Stiftungsrates: Dr. Michael H. Wappelhorst<br><br><o:p></o:p></span></p><p class=MsoNormal style='margin-bottom:0cm;line-height:normal'><span style='font-size:12.0pt;font-family:"Aptos",sans-serif'>_______________________________________________ Nhcoll-l mailing list Nhcoll-l@mailman.yale.edu https://mailman.yale.edu/mailman/listinfo/nhcoll-l _______________________________________________ NHCOLL-L is brought to you by the Society for the Preservation of Natural History Collections (SPNHC), an international society whose mission is to improve the preservation, conservation and management of natural history collections to ensure their continuing value to society. See http://www.spnhc.org for membership information. Advertising on NH-COLL-L is inappropriate. <o:p></o:p></span></p></div></body></html>