[Nhcoll-l] Wanted: producer of square "museum" glas for exhibitions

Mon Oct 31 05:12:53 EDT 2022

Dear Mikkel,

Dirk is almost correct about the battery jars. Though they are not made 
or sold anymore as battery jars, if you are lucky you can find some at 
some local house furnishing store. I found some very nice rectangular 
jars at "Dille & Kamille" a few weeks back in Belgium while i was there 
for holidays. Its a huge dutch franchise, so maybe they have some store 
in Denmark as well. But its probable that other stores of this sort run 
this kind of jars as well. For me it was great because they sold the 
jars as retail for only 2 Euros each. Its not the best jar, since it has 
some strong curves made by the uneven melted glass, since these jars are 
molded in a cast. But this goes for all battery jars, even the new ones 
sold by DWK (Schott was bought by Duran long time ago and now Duran runs 
under the name DWK, since they joined with Wheaton and Kimble, other 
glassfactories).

Here are the ones form Duran or DWK: 
https://www.dwk.com/duran-museum-jar-with-ground-glass-plate

They are pretty expensive, and the Lid is not very nice, since it defers 
a bit from the jar, so you should grind down the edges. But they are 
made of borosilicate, so excelent glass quality (not the lid!). Prices 
go between 70-150 Euro per jar.

There are two German suppliers that sell some square sodalime jars as 
well (around 20-50 Euro each):

- 
https://www.assistent.eu/en/product/specimen-jars-museum-jars-made-of-clear-glass-with-ground-cover-plate/

- 
https://www.neubert-glas.de/laborglas/onlineshop/katalog.php?KATfrom=suche&SearchText=pr%E4parat&struc=1_995727484085_1030342896125_1005301727684_1515949502601&kat=1023362157218&PHPSESSID=1effb50f3b77f3e7035b5480d4f6ce4b 
(german only.. I suggest you call them for more information)

The problem and this goes as well for the borosilicate and the cheap 
house furnishing store jars, is that the sizes are very limited. So 
usually very small and nothing compared with the pretty big sizes you 
showed in the picture. These are almost impossible to get new.

So there are actually just 2 solutions if you insist in big sized square 
jars: One is to ask at some lab-glassblower factory. There a big jar can 
costs arround 500-700 Euros each. I just did some calculating for a 
project I'm working on. So they do exist! The jars are welded of plain 
borosilicate glassplates, so there is no unevenness as in the molded 
jars. The welding in the corner can be seen though, its less smooth as 
in the battery jars. But not really a problem. Its just the immense costs.

The other way is to ask at other nat. hist. institutions. Some have a 
big "stash" of old jars that may be sold or exchanged for a favor or 
whatever. Maybe you are lucky and they will just donate them. It's they 
only thing i can think of that excludes a very big investment. Besides 
looking for this jars in local second-hand internet sites. Sometimes 
there you are lucky too.

If you need more info about Jars (cylindical too) just contact me 
directly. I have been dealing with this topic for a long time and have 
made some good contacts, even within DWK.

All the best in the search!

Am 28.10.22 um 14:53 schrieb Dirk Neumann:
> Dear Mikkel,
>
> the historic battery jars are no longer produced; alternatively you 
> can use Schott Borosilicate tubes which can be customised in diameter 
> and length (5 cm to 35 cm and up to 2.0 tall). You might have seen the 
> tall wide jar I posted a few days back. But for the collection in 
> Munich they produced tall wide cyclinders (25 cm x 1,0 m) for the 
> Australian lungfishes and Arapaima
>
> These glass cylinders have less tension within the glass and are more 
> stable against temperature and humidity shifts (the battery jars can 
> crack if the temperature e.g. drops within 2-3 days to below 14°C).
>
> One producer is Gaßner Glastechnik <https://gassner-glastechnik.de/> 
> in Munich; I have been working with them for many years.
>
> You can also check directly with Schott; there is a catalogue, but 
> this is not openly available. But they still produce specimen jars.
>
> The also did some rectangular containers, but smaller ones (approx. 20 
> cm high and wide).
>
> The other source might be Stölzle Oberglas in Vienna, but usually they 
> only start production if the order is above 200 containers (in the 
> past museums teamed up for orders).
>
>
> Hope this helps
> Dirk
>
>
>
> Am 28.10.2022 um 14:27 schrieb Mikkel Høegh Post:
>>
>> Hi
>>
>> Here at the Natural History Museum of Denmark we are preparing new 
>> exhibitions opening 2025. We need additional square museum glass for 
>> wet specimen display -we have a bunch (an example below), but need 
>> more sizes. I wonder if any (preferable European) company produce such?
>>
>> Best regards,
>>
>> *Mikkel Høegh Post*
>>
>> Samlingsmedarbejder, konservator cand.scient.
>>
>> Statens Naturhistoriske Museum
>>
>> *Zoologisk Museum*
>>
>> Universitetsparken 15
>>
>> 2100 Kbh.Ø
>>
>> MOB 60 74 10 25
>>
>> _mhpost at snm.ku.dk_ <mailto:mhpost at snm.ku.dk>
>>
>> Profil <https://snm.ku.dk/ansatte/ansatte/?id=55015&vis=medarbejder>
>>
>> IMG_0821.JPG
>>
>> _Sådan beskytter vi persondata_ 
>> <https://informationssikkerhed.ku.dk/persondatabeskyttelse/privatlivspolitik/>
>>
>>
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>
> -- 
>
> ******
>
> **
>
> *Dirk Neumann*
>
> Collection Manager, Hamburg
>
> Postal address:
>
> *Museum of Nature Hamburg*
> Leibniz Institute for the Analysis
>
> of Biodiversity Change
>
> Dirk Neumann
>
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>
> 20146Hamburg
> +49 40238 317 – 628
>
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>
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>
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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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> _______________________________________________
> 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. Seehttp://www.spnhc.org  for membership information.
> Advertising on NH-COLL-L is inappropriate.
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