Here is an example of a black light in action. The fake is a 1957 Seattle Popcorn card of George Munger. Although printed during a time when some paper stock had whiteners that caused the paper to fluoresce, none of the Seattle Popcorn cards (1954 - 1968) fluoresce under a black light. It might be instructive to compile a list of vintage post-war issues that should not fluoresce.
I discovered this fake in my collection a couple of years after acquiring it. I believe the seller dealt in good faith and because so much time had elapsed I did not pursue the issue with him. This card does not come up often, but luckily I got one shortly after my "discovery" for about half of what I had paid for the fake.
