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<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Dear Esther,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Sorry for the late answer.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">It seems that there is no real study about the effects of Vaseline sealing’s… It all comes from experience. So here I can share mine.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">For the projects I was working on in Bern (about 4000 Jars) I used the Vaseline you asked about, its medical quality, like Joachim suggested.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">I use heated stoppers to close the jars (at around 70-90 °C, depending on the size), so after cooling down they build up a little vacuum in the
jar that helps for a much better sealing. The Vaseline spreads evenly on all the surface of the grounding on the stopper so it’s very easy to see if its seal is tight. If the stopper is not fitting, don’t use it… it’s never going to make a good seal, specially
on old Jars.<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">This is why I don’t use Alrisol, it does not spread with heat, and yes, it is pretty expensive.
<u>But</u> if you close the jars <u>without heat</u> it makes a great sealing, like Dirk said. And has a much better adhesion that pure Vaseline, finally it was developed exactly for this purpose.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">So I would rather point out that it depends on the sealing method you are using.<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Hope this helps you.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Greeting from Essen,<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D">--<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D">+49 (0) 201 24681 470<o:p></o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D">Stiftung Ruhr Museum<o:p></o:p></span></b></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D">Fritz-Schupp-Allee 15<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D">45141 Essen<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D"><a href="http://www.ruhrmuseum.de">www.ruhrmuseum.de</a><o:p></o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">Von:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> Nhcoll-l [mailto:nhcoll-l-bounces@mailman.yale.edu]
<b>Im Auftrag von </b>Esther Dondorp<br>
<b>Gesendet:</b> Donnerstag, 27. Februar 2020 15:32<br>
<b>An:</b> nhcoll-l@mailman.yale.edu<br>
<b>Betreff:</b> [Nhcoll-l] Question about jar grease in fluid collections<o:p></o:p></span></p>
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<p class="MsoNormal">Dear all,<o:p></o:p></p>
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<p class="MsoNormal">Just a short question - we always use vaseline to seal gound jar stoppers, now that we cannot use our old supplier anymore the support department ordered the commercial vaseline petroleum jelly like<a href="https://www.drogisterij.net/verzorging/lichaamsverzorging/lichaamsverzorging-verzorging/creme/vaseline-petroleum-jelly-original-42182634?partnercode=222&gclid=EAIaIQobChMIiOnM3_fx5wIVWeN3Ch1X_wOHEAQYASABEgJTI_D_BwE">
this</a> one. I was wondering if we can use it or that it has additional additives that can effect the balance inside the jar. Is there an acid free or other alternative? Wondering what other people use! <o:p></o:p></p>
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<p class="MsoNormal">Many thanks,<o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"Arial","sans-serif"">Esther Dondorp</span>
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<p class="MsoNormal"><span style="font-family:"Arial","sans-serif"">Senior Collectiebeheerder</span><o:p></o:p></p>
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<sub><span style="font-family:"Arial","sans-serif"">+31717519313 - - </span></sub><o:p></o:p></p>
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<p class="MsoNormal"><sub><span style="font-family:"Arial","sans-serif""><a href="mailto:esther.dondorp@naturalis.nl" target="_blank">esther.dondorp@naturalis.nl</a> - <a href="https://www.naturalis.nl" target="_blank">www.naturalis.nl</a></span></sub><o:p></o:p></p>
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<p class="MsoNormal"><sub><span style="font-family:"Arial","sans-serif"">Darwinweg 2, 2333 CR Leiden</span></sub><o:p></o:p></p>
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