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Subject: Light exposure limits

Light exposure limits

From: Barbara Appelbaum <aandh>
Date: Friday, December 3, 1999
Re William Hall's response to the query about exhibiting
light-sensitive material:  there is quite a bit more to say on the
subject.  It is difficult to know what exactly can be done without
knowing more about the exhibition, but, for example: light should be
excluded completely when the rooms are not open to the public;  if
visitation is not constant, curtains can be used to cover cases or
timers can be put on lights;  the arrangement of objects in
galleries should be segregated by sensitivity;  visitors should be
led gradually into the darker galleries;  light distribution must be
done carefully to allow comfortable viewing in low light levels;
color temperature can be adjusted for less deterioration; some
objects can be rotated, etc., etc.  Depending on the exact
situation, a great deal can be done by someone who knows about this.
In addition, some consideration should be given to the exact
sensitivities of individual objects based on their media, pigments,
etc., and on their rarity and value before decisions are made on
what to exhibit.

B. Appelbaum

                  Conservation DistList Instance 13:33
                 Distributed: Friday, December 3, 1999
                       Message Id: cdl-13-33-002
Received on Friday, 3 December, 1999

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