Q: What are the advantages of using Plexiglas for framing
drawings and watercolors? I've been told that Plexiglas can harm
paintings and drawings because it can chemically react with their
surface.
A: Although it's highly unlikely that any kind of chemical
reaction would take place between the artwork and the acrylic glazing
known as Plexiglas, problems can arise if you allow the drawing or
painting to come in contact with it. As a result, you should never
allow the work of art to be framed in such a way that the glazing (even
if it's glass) comes into contact with the work. I strongly advise that
you use a window mat and spacer to provide at least a 1/4" air space
when framing with Plexiglas.