sun fading of art works
Most people are probably aware of the power of sunlight in fading the colours of carpets, upholstery and drapes. I wonder how many realize the sun's effect on the art work on the walls. Now we can see for ourselves in this very revealing article by Thomas Crossland: Sun-Fading and UV-Glass Experiment.
Thanks to Julio at BarenForum, a woodblock printmakers' group blog, for pointing out this link.
I have been told that plexiglass offers some protection. I have a print of my own framed with plexiglass on a wall that does get some sun on it in the late afternoon some times of the year, and it has faded in the decade it's been there. I think now there is a better grade plexiglass available, which may be more protective. It would be very interesting to see this kind of test to prove out the claim. Have you noticed how many museums display very old works under very dim lighting?