Posted By:
MikeU"Lastly, black-lighting is not an exact science, many cards will glow under a black-light that are totally original. The reason is if a card was taken out of an album there can be leftover residue remaining on the card."
True to some extent, but the majority of glowing is not simply speckled or bloched glowing on the back of the card from album residue. Even in those cases, it may be glue from rebacking and not album reminents. In any case, you can pretty easily tell from the texture of the card where you stand. When you have glowing front borders or glowing jagged corners, you have a clarly altered card.