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<div class="moz-cite-prefix">Dear Mike,<br>
<br>
depending on the climatic conditions inside you storage area and
the holding fluid the specimens are stored in rusting of lids can
be a major issue of course. However, because of the narrow thread
of twist-off jars, I am not entirely sure of the metal lids can be
easily replaced with plastic lids. The latter usually need higher
threads because plastic lids tend to be deformed when screwed
tight. This is the reason why jars with plastic lids normally have
two fully closed thread turns, compared to jars with metal lids
which usually only have half thread turns. <br>
<br>
Moreover, plastic lids (e.g. PE or PP lids) do not form a good
barrier against oxygen, and changing lids might increase or
trigger oxidation issues inside jars.<br>
<br>
My advice would be to look into modern metal lids designed for
food industry to close jars with sour ingredients (compared to
lids for sweet stuff such as jam or honey); these usually have
thicker liners inside which protect lids against scratching. Also
made bad experiences with (self-designed) PE-foil inlays, an
earlier curator introduced in our collection: the foil is no good
barrier against compounds evaporation from holding fluids, but a
perfect trap to hold condensates inside a tiny, highly corrosive
atmosphere lid and foil which tends to accelerate deterioration of
metal lids. <br>
<br>
Might be worth to check in the food sector for replacement lids or
inquire such suppliers where to find 130mm lids.<br>
<br>
All the best<br>
Dirk<br>
<br>
Am 21.02.2018 um 21:57 schrieb Mike Rutherford:<br>
</div>
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<p class="MsoNormal">Hi, <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I’m trying to source large polypropylene
screw top lids for some glass jars I have in my museum. The
jars are wide mouthed and squat, making them ideal for those
weird shaped specimens but the current lids are thin metal
ones which are corroding badly. My previous source for lids
was Carolina Biological Supplies but their maximum size of lid
is 120mm diameter and I need ones of 130mm diameter.
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Can anyone suggest a supplier, preferably
in the western hemisphere?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Cheers,<o:p></o:p></p>
<p class="MsoNormal">Mike<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><b><span style="font-family:"Bookman
Old
Style",serif;color:black;mso-fareast-language:EN-GB"
lang="EN-US">Mr. Mike G. Rutherford</span></b><span
style="font-family:"Bookman Old
Style",serif;color:black;mso-fareast-language:EN-GB"
lang="EN-US"><br>
Curator of the University of the West Indies Zoology Museum
(UWIZM)<br>
Department of Life Sciences<br>
<b>The University of The West Indies<br>
St. Augustine Campus<o:p></o:p></b></span></p>
<p class="MsoNormal"><b><span style="font-family:"Bookman
Old
Style",serif;color:black;mso-fareast-language:EN-GB"
lang="EN-US">Trinidad & Tobago, W.I.</span></b><span
style="font-family:"Bookman Old
Style",serif;color:black;mso-fareast-language:EN-GB"
lang="EN-US">
<br>
T: (Office) 868-662-2002 ext 82231<br>
T: (Mobile) 868-329-8401<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Bookman Old
Style",serif;color:black;mso-fareast-language:EN-GB"
lang="EN-US">E:
<a href="mailto:mike.rutherford@sta.uwi.edu" moz-do-not-send="true">mike.rutherford@sta.uwi.edu</a><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Bookman Old
Style",serif;color:black;mso-fareast-language:EN-GB"
lang="EN-US">S: mike.g.rutherford<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Bookman Old
Style",serif;color:black;mso-fareast-language:EN-GB"
lang="EN-US"><br>
Find us on<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Bookman Old
Style",serif;color:black;mso-fareast-language:EN-GB"
lang="EN-US">Website:
<a class="moz-txt-link-abbreviated" href="https://urldefense.proofpoint.com/v2/url?u=http-3A__www.sta.uwi.edu_fst_lifesciences_uwi-2Dzoology-2Dmuseum&d=DwMD-g&c=cjytLXgP8ixuoHflwc-poQ&r=LpYc_Z_iN1KRw0hheb3x6-8MJUMu482qfHowpGYJqwc&m=UKkvshUmkFKgXIgWb06LnWOus6cTsvwEGL6L4R0PUxQ&s=6cvr4AeQ-A3OABL4MvAgycTiEccDVJO_-b96xXzwVAI&e=">www.sta.uwi.edu/fst/lifesciences/uwi-zoology-museum</a>
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Bookman Old
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lang="EN-US">Facebook: <a class="moz-txt-link-abbreviated" href="https://urldefense.proofpoint.com/v2/url?u=http-3A__www.facebook.com_uwizoologymuseum&d=DwMD-g&c=cjytLXgP8ixuoHflwc-poQ&r=LpYc_Z_iN1KRw0hheb3x6-8MJUMu482qfHowpGYJqwc&m=UKkvshUmkFKgXIgWb06LnWOus6cTsvwEGL6L4R0PUxQ&s=3Kj_0ms32zS8w8_YI8n1mJWaklVj175xxnQEP2gAIvQ&e=">www.facebook.com/uwizoologymuseum</a><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Bookman Old
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<p class="MsoNormal"><span
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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:
Staatliche Naturwissenschaftliche Sammlungen Bayerns
Zoologische Staatssammlung München
Dirk Neumann, Sektion Ichthyologie / DNA-Storage
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---------
Dirk Neumann
Tel: +49-89-8107-111
Fax: +49-89-8107-300
email: Dirk.Neumann(a)zsm.mwn.de
postal address:
Bavarian Natural History Collections
The Bavarian State Collection of Zoology
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