[Nhcoll-l] [EXTERN] Re: Historic jars gasket

[Dirk Neumann]

Hi Laura,

the 3 mm gap between the lid and the neck of the jar is not the problem, unless the stopper itself fits nicely into the joint and the contact surfaces / diameters of the neck-joint and the stopper fit (i.e. the stopper would not wobble in the joint). Even then, you could use slightly more Alsirol to fit the stopper in the slightly wider opening, because the Alsirol - compared e.g. to Vaseline, is rather stable and would not start flowing down.

Silicon and other sealants like putty are hard to remove and not so easily "reversible". The contact surface of the joint should be long enough to make a good closure, an additional gasket is not required in my view.

Hope this helps,
with best wishes
Dirk


Am 05.02.2024 um 18:57 schrieb Callomon,Paul:
ACHTUNG/ATTENTION: Diese E-Mail stammt von einem externen Absender. / This e-mail comes from an external sender.


Hi Laura,

Those look like Whittall-Tatum jars, made here in Philadelphia. We have them in our collection. We have successfully sealed these jars with silicon caulk in the past, but certain of its curing products - such as acetic acid - could affect the fluid. One material that has been used to cut gaskets is neoprene, and butyl rubber sheet might also be fine, especially if you thinly coat both glass faces with non-setting vacuum grease. If you do use caulk, use very little pressure on the clamp as without a gasket you could crack the lid through overtightening or even temperature changes.

Our iconic Walter the Octopus is in a large 25-gallon WT jar whose lid is stuck on with silicon (no clamp could be found) and it's held for 23 years so far.



Paul Callomon

Collection Manager, Malacology and General Invertebrates

________________________________

Academy of Natural Sciences of Drexel University, Philadelphia
callomon at ansp.org<mailto:callomon at ansp.org> Tel 215-405-5096 - Fax 215-299-1170




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From: Nhcoll-l <nhcoll-l-bounces at mailman.yale.edu><mailto:nhcoll-l-bounces at mailman.yale.edu> on behalf of Laura Rincón <collectionslitclub at gmail.com><mailto:collectionslitclub at gmail.com>
Sent: Monday, February 5, 2024 12:19 PM
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Subject: [Nhcoll-l] Historic jars gasket


External.


Hello everybody,

I've been reading some thread emails about sealants in historic jars, but I can't find what the best way to close these jars is (see photos attached). I was planning to get Alsirol, but then I realized that there is a 3 mm. space between the rim and lid. The "best" will be a gasket, but I'm not sure if there are proper gaskets for these jars.

I would appreciate your recommendations or advice.

Thanks,

--

Laura A. Rincón R. |  Museum Studies professional

Museum Specialist

Division of Invertebrate Zoology

American Museum of Natural History

Central Park West at 79th Street

New York, NY 10024

 https://collectionslitclub.wordpress.com/



“I’ve learned that people will forget what you said, people will forget what you did, but people will never forget how you made them feel” Maya Angelou



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Dirk Neumann
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--
Stiftung Leibniz-Institut zur Analyse des Biodiversitätswandels
Postanschrift: Adenauerallee 127, 53113 Bonn, Germany

Stiftung des öffentlichen Rechts;
Generaldirektion: Prof. Dr. Bernhard Misof (Generaldirektor), Adrian Grüter (Kaufm. Geschäftsführer)
Sitz der Stiftung: Adenauerallee 160 in Bonn
Vorsitzender des Stiftungsrates: Dr. Michael Wappelhorst
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