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

[Dirk Neumann]

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
>
>
>
>
>
>
> _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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>
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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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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
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