Controlling light exposure

[NRPollak@xxxxxxx]

I am currently treating a 4' x6' painting on muslin fabric.  It was painted 
by a sign painter, in the style of painted theater curtains, but it is 
stretched on a stretcher. The owners (a public library) plan to have the 
painting framed, with UV-filtering glazing.  It will hang in an area where it 
will receive no direct light exposure, except for one part of the year, when 
the sun will shine on part of the wall where the painting will hang.  Because 
of the size of the painting and the configuration of the space, they are 
limited as to where the painting can be hung, but they realize that they need 
to do something about the light exposure.  They are willing to consider all 
options, including removing the painting during the time of year when the sun 
is a problem, covering the painting, or using a shutter system on the 
skylights causing the problem.  I'm interested in hearing how others have 
dealt with such a problem, with either high or low-tech solutions.

Nancy Pollak
Art Care Associates