RE: mould over gum
This is not a new technique, but a problem submitted me by a friend.
She told me that some of her gum bichromates have developed small white
dots, and asks for something able to kill the mould and its spores but not
the color of the image.
I am thinking to salicylic or ascorbic acid (or their salts) instead of the
old and more poisonous mercuric chloride, or to some commercial agricultural
products. Have you any better solution?
I add a "squirt" of thymol solution to my gum when I mix it up. No mold.