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<div class="moz-cite-prefix">Dear Paul,<br>
<br>
we had bad results with PTFE tape because it didn't seal jars
adequately even though tied thoroughly around the lids. <br>
<br>
Parafilm as Tony suggested works much better. You can easily
remove it residue-free again, but be careful if wrapping parafilm
around jars that are closed with ground stoppers / glass planes
& grease (e.g. old battery jars): the parafilm will dissolve
quickly into a rather sticky slime, which can hardly be removed.<br>
<br>
For twist-off jars with metal lids adding additional Teflon liners
to be inserted in the lids might be an idea: colleagues in
Switzerland use those with pretty good results for several years
now (the website is in German, they don't offer a English version,
sorry - But from the pictures you may get an idea what those
liners look like).<br>
<span class="Apple-style-span" style="border-collapse: separate;
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normal; font-weight: normal; letter-spacing: normal;
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font-size: medium; "><span style="font-size: 11pt; font-family:
Calibri, sans-serif; color: rgb(31, 73, 125); " lang="DE-CH"><a
href="http://www.taxidermy.ch/p078000003.html?article_id=78000164&shop_action=detail"
style="color: blue; text-decoration: underline; ">http://www.taxidermy.ch/p078000003.html?article_id=78000164&shop_action=detail</a></span></span>
<br>
<br>
I am not sure if these are available in the US, but these liners
not only seal but also protect metal lids against evaporating
moisture thus preventing them from rusting.<br>
<br>
For Le-Parfait jars etc. you can also add some high quality joint
grease - but be careful and avoid any silicon based vacuum grease
as it is nearly impossible to bring the silicon oil off the
glasses after the silicon grease deteriorated (which happens
within few years).<br>
<br>
Hope this offers some ideas ...<br>
<br>
All the best<br>
Dirk<br>
<br>
Am 10.01.2014 22:48, schrieb Callomon,Paul:<br>
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<p class="MsoNormal">Folks,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">At least 20 years ago (before my time
here), white plumbers’ tape was wrapped around the edge of the
lids and onto the sides of all the bottle and jars in a
certain section of our alcohol collections. This is the PTFE
tape that plumbers use to seal threads; it is thin, soft and
non-adhesive. Presumably the idea was to provide a secondary
vapor barrier in addition to the jar lid seal.
<o:p></o:p></p>
<p class="MsoNormal">We are now doing long-overdue major
maintenance on this collection, and are trying to assess the
efficacy of this tape. I’d be very interested to hear from
anyone who (a) has used it and can show it works (b) has used
it and can show it doesn’t work, or (c) who considered using
it but decided not to, and why.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal" style="background:white"><b><span
style="font-size:10.0pt;color:black">Paul Callomon</span></b><span
style="font-size:10.0pt;color:black"><br>
<i>Collection Manager, Malacology, Invertebrate Paleontology
and General Invertebrates</i></span><span
style="color:black"><o:p></o:p></span></p>
<div class="MsoNormal"
style="text-align:center;background:white" align="center">
<span style="font-size:10.0pt;color:black">
<hr size="2" width="100%" align="center">
</span></div>
<p class="MsoNormal" style="background:white"><b><span
style="font-size:10.0pt;color:black">Academy of Natural
Sciences of Drexel University, Philadelphia</span></b><b><span
style="font-size:10.0pt;color:black"><o:p></o:p></span></b></p>
<p class="MsoNormal" style="background:white"><span
style="font-size:10.0pt;color:black">1900 Benjamin Franklin
Parkway, Philadelphia PA 19103-1195, USA</span><span
style="font-size:10.0pt;color:black"><br>
<i><a moz-do-not-send="true" href="mailto:callomon@ansp.org"
target="_blank"><span style="color:blue">callomon@ansp.org</span></a>
Tel 215-405-5096 - Fax 215-299-1170</i></span><span
style="font-size:12.0pt;color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<pre class="moz-signature" cols="72">--
Dirk Neumann
Tel: 089 / 8107-111
Fax: 089 / 8107-300
email: Dirk.Neumann(a)zsm.mwn.de
Postanschrift:
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---------
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Fax: +49-89-8107-300
email: Dirk.Neumann(a)zsm.mwn.de
postal address:
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The Bavarian State Collection of Zoology
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