We investigated various UV films and concluded that there are no films 
that can be safely applied to historic glass and can be easily removed 
when it is time to replace the film (typically 10-15 years). We opted, 
instead, for film attached to spring-loaded roller shades. It was a 
painful decision, as the roller shades are not invisible and do cause a 
small amount of damage for the mounting hardware. The trade-off, 
however, is that the rollers are easy to replace without tools and 
without further damage to the historic fabric. Now, about 9 months 
after installation, we are happy with our decision -- our visitors 
hardly notice the film, and we actually use our experience to explain 
to our visitors what measures are necessary to preserve historic fabric 
in a historic building.
-- 
Wade Lawrence
Assistant Director, Drayton Hall
A National Trust historic site
http://www.draytonhall.org
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> A local museum is exploring options for installing UV film on its 
> windows to protect its collection.  They are curious to hear about 
> other museums' experiences deciding what film is most appropriate.  
> Some of the the museum's criteria is that it be non-visible, can be 
> removed without leaving a trace, safe for historic glass, and of 
> course, reasonably priced.  If anyone can share their knowledge in the 
> area of protective UV film, we could all use a lesson here. 

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