02-08-2005, 07:27 PM
From what I understand, the glowing is caused by the lighting up of chemicals used to bleach the paper that you don't find in the 40's or earlier. You find the same phenomenon with paper money, and is one of the ways to identify real from counterfeit money (real bills don't glow under black light, except inks and fibers that are purposely included as security features).












