Quote:
Originally Posted by rgpete
I did a test on a 75 common card with a black marker, the ink covered the letters.Also when you look at the Gibson card at different angles under a bright light with a 10x jewelers loupe the mark is behind the green letters
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I have found that a 1200dpi or better scan works much better than a small 10X loupe. Also compare the black ink on the back of your card to the black ink on the front of another 75 Gibson card under a cfl, halogen, and black light to make sure the ink reacts the same under those 3 different light sources. Some swear by only black lights, I find them to be the least useful unless the card was altered by a modern marker/ink.