[Nhcoll-l] Thanks

[Dirk Neumann]

Hi Tom,

the problem with the Copenhagen lids supposedly is the denaturing agent 
that is used in Europe: it is a very aggressive Ketone 
(methylethylketone or MEK); might be worth to check this on your order 
forms of your supplier or on your ethanol containers. Copenhagen jars do 
better in collections using camphor as denaturant though (Belgium and 
France).
Same here in Munich, al lot of cracking and I am disposing all those 
jars of; might be worth to opt for standardised metal twist-off lids or 
pharmaceutical jars (clear glass quality, PP lids with PE-inlays). First 
lids are used in our collections and Stockholm since many years with 
good results (and because lids and jars have standardised neck easy to 
replace in case of failure). Second type was introduced in our 
collection more then 10 years ago with good results; replaced on this 
occasion old backelite lids.

Have been testing Andy's jars since some time now (on the window sill 
with indirect sun exposure) with good results, but as Andy knows, I am 
also sceptical if these labels will survive decades of storage in MEK 
alcohol.

All the best
Dirk



Am 25.06.2018 um 10:49 schrieb Tom Schiøtte:
>
> Yes Andy, I thought you would say that, but the problem is your own 
> words below. “…longevity…” and “...that will stand the test of time…”. 
> We know that carbon pigmented ink on good quality archival paper has 
> done this. We don’t know yet what polyester will do. You may well be 
> proven right in time, but other examples scare. Our Copenhagen 75 g 
> glass jars have good quality plastic lids that back in the 1960’es 
> were thought to be able to last for eternity. After more than half a 
> century they have started to crack, and we have thousands and 
> thousands of them…
>
> Tom
>
> *From:*Bentley, Andrew Charles <abentley at ku.edu>
> *Sent:* 22. juni 2018 17:18
> *To:* Tom Schiøtte <tschioette at snm.ku.dk>
> *Cc:* nhcoll-l at mailman.yale.edu
> *Subject:* Re: [Nhcoll-l] Thanks
>
> To me, this seems like a lot of additional effort (not to mention the 
> fact that this technology is on its way out and ever harder to 
> maintain) to produce labels that are inferior in both quality and 
> longevity to those produced by thermal transfer printing on spin bound 
> polyester media.  The initial monetary investment may be greater but 
> the reward in terms of Museum quality labels that will stand the test 
> of time far exceeds this.
>
> Andy
>
> Sent from my iPad
>
>
> On Jun 22, 2018, at 7:52 AM, Tom Schiøtte <tschioette at snm.ku.dk 
> <mailto:tschioette at snm.ku.dk>> wrote:
>
>     Thanks to all for answers, comments, suggestions concerning InkJet
>     printers. Lots of valuable stuff there. Jean-Marc’s reference
>     gives a crucial requirement: Carbon pigmented ink which passes the
>     ISO 11798:1999 (for black ink).And I like Heidi’s ironing
>     practice. Low technological approaches are often good in the long
>     run. Thanks again.
>
>     *Tom Schiøtte*
>
>     **
>
>     *Collection manager, Echinodermata & Mollusca*
>
>     *Natural History Museum of Denmark (Zoology)*
>
>     *Universitetsparken 15*
>
>     *DK 2100 Copenhagen OE*
>
>     **
>
>     *+45 35 32 10 48*
>
>     *TSchioette at snm.ku.dk <mailto:TSchioette at snm.ku.dk>*
>
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-- 
Dirk Neumann

Tel: 089 / 8107-111
Fax: 089 / 8107-300
*new email: neumann(a)snsb.de*

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Staatliche Naturwissenschaftliche Sammlungen Bayerns
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Dirk Neumann, Sektion Ichthyologie / DNA-Storage
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81247 München

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---------

Dirk Neumann

Tel: +49-89-8107-111
Fax: +49-89-8107-300
*new email: neumann(a)snsb.de*

postal address:

Bavarian Natural History Collections
The Bavarian State Collection of Zoology
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