[Nhcoll-l] Wanted: producer of square "museum" glas for exhibitions
Simon Moore
couteaufin at btinternet.com
Mon Oct 31 06:14:11 EDT 2022
Many thanks Fabian and I suspected as much. Sometimes museums have to form a p[urchasing syndicate with others to buy large numbers but the accountants find it too complicated!
With all good wishes, Simon
Simon Moore MIScT, RSci, FLS, ACR
Conservator of Natural Sciences and Cutlery Historian,
www.natural-history-conservation.com
> On 31 Oct 2022, at 09:58, Fabian Neisskenwirth <info at naturhistorische-konservierung.de> wrote:
>
> Dear Simon,
>
> yes, the lid overlaps the edge. I think that if one is paying more that 100 Euros for a Jar, this should not happen. But since they at least offer the jars, its something to live with and since they are normal sodalime floatglass plates it can be grinded off very easely.
>
> And the price is just because of the small demand. DWK sells their "normal" labglass product for very good prices, but these are made in gigantic masses, so they can take less price for them. The only way of getting lower prices in in asking for a very big load of jars, this will push down the price. But I'm talking about thousands of jars at least. So in the end it doesn't mater if its DWK, Stoelzle, SIMAX or whatever big Glassfactory. They will all do it, since its technically possible, but they will make a mold, and use specific made tools, so they need a mass of production that covers the costs of making these, then the price is lower.
>
>
>
> All the best,
>
> Am 31.10.22 um 10:47 schrieb Simon Moore:
>> Many thanks for that update Fabian! The DWK jars are just unaffordable now for most museums so it’s good to know that there are other and cheaper suppliers. I didn’t understand what you meant by' the lid defers bit from the jar’ - slightly overlaps the edge of the jar?
>>
>> I’m glad to see that these jars are being made again and hopefully the DWK range will come down to a more realistic level!
>>
>> With all good wishes, Simon
>>
>> Simon Moore MIScT, RSci, FLS, ACR
>> Conservator of Natural Sciences and Cutlery Historian,
>>
>>
>> www.natural-history-conservation.com
>>
>>
>>
>>
>>
>>> On 31 Oct 2022, at 09:12, Fabian Neisskenwirth <info at naturhistorische-konservierung.de>
>>> wrote:
>>>
>>> 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 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
>>>>>
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>>>>>
>>>>> 2100 Kbh.Ø
>>>>>
>>>>>
>>>>>
>>>>> MOB 60 74 10 25
>>>>>
>>>>>
>>>>> mhpost at snm.ku.dk
>>>>>
>>>>>
>>>>> Profil
>>>>>
>>>>>
>>>>>
>>>>> <image001.jpg>
>>>>>
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>>>>> Sådan beskytter vi persondata
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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
>>>> Martin-Luther-King-Platz 3
>>>> 20146 Hamburg
>>>> +49 40 238 317 – 628
>>>>
>>>> d.neumann at leibniz-lib.de
>>>> www.leibniz-lib.de
>>>>
>>>>
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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)
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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. See
>>>>
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>>>>
>>>> for membership information.
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>>> 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. See
>>> http://www.spnhc.org
>>> for membership information.
>>> Advertising on NH-COLL-L is inappropriate.
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