There are several websites dealing with mold on art works. Type in
mold on art work.
One good site is
>> Help! I had some old artwork stored on its side in my parents'
>> (Not the best place at all, I know, but I don't have many other
>> places I can
>> put it.) The floor leaches minerals up from the foundation, and over
>> course of about half a year a nice crop of mold has grown up on
>> pieces. I could have sworn the area I set them was dry but I guess
>> learned something about tempting fate.
>> Does anyone know a way to clean the mold off and sterilize it without
>> causing too much damage? Luckily there are really only two pieces
>> it's noticeable. The one that got it the worse has a satin mat and
>> is done
>> on some kind of colored card.
>> Help would be greatly appreciated!!!
>> ~Tiffany Miller