[Nhcoll-l] lighting guidelines for fluid preserved specimens in exhibitions

Mon Dec 17 06:36:07 EST 2018

Dear Esther,

In attachment please find a guideline for the care of biological collections.

Hope it helps also.

Best,

---------------------

Catarina Teixeira

Conservação de Coleções Científicas I Conservation of Scientific Collections
E-mail: cteixeirasilva at museus.ulisboa.pt
Tel. +351 210443544 / 919087321
________________________________
Museu Nacional de História Natural e da Ciência
Universidade de Lisboa
Rua da Escola Politécnica, 56/58, 1250-102, Lisboa?
www.museus.ulisboa.pt
________________________________
De: Nhcoll-l <nhcoll-l-bounces at mailman.yale.edu> em nome de Dirk Neumann <neumann at snsb.de>
Enviado: segunda-feira, 17 de dezembro de 2018 10:09
Para: nhcoll-l at mailman.yale.edu
Assunto: Re: [Nhcoll-l] lighting guidelines for fluid preserved specimens in exhibitions

Hi Esther,

to preserve the (living) colouration of specimens usually requires specific preservatives (which usually are not allowed to be used on exhibition anyway); what is still recognisable in preserved specimens is mostly the pigmentation pattern. Melanophores can be easily damaged by UV radiation, so the question is not so much how much lux would be appropriate (or not), but how high the UV radiation inside the gallery would be. Usually, light levels should be kept as low as possible, a rough estimate is "150 lux or less". If you have lamps that emit UV light, UV filters should be considered. Also (even faint) sunlight exposure should be avoided as best as possible (but you surely considered this).

Hope this helps,
best wishes to Leiden
Dirk

Am 17.12.2018 um 11:42 schrieb Esther Dondorp:
Dear all,

For our new exhibitions we have some fluid preserved (ethanol) specimens that will be on display for the public. For dry mounted specimens we have lighting guidelines but for fluid preserved specimens it is thought that there are no restrictions because ethanol does fade the colors anyway. I think that light can decolorate a fluid specimen too so that we need some standards for them aswell.

I am curious what others use as a light regime for fluid specimens. How long and under what lightstrength (lux) do you exhibit an alchol specimen to make sure it does not fade too much?

Many thanks,

Esther Dondorp
collections manager
[https://06ecba7b-a-deac235a-s-sites.googlegroups.com/a/naturalis.nl/signatures/home/logo-new.png]

071-751 9313 -
esther.dondorp at naturalis.nl<mailto:esther.dondorp at naturalis.nl> - www.naturalis.nl<https://www.naturalis.nl>
Vondellaan 55, 2332 AA Leiden
Postbus 9517, 2300 RA Leiden

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