Card doctoring...

[rainier2004]

Alright, it sounds like David knows much more than myself but I do not think TPGs are using the equipment that he is referring to...maybe I'm wrong, but I've never seen anyone use more than a 80x loupe, black light and some computer technology. So in that regard, with those tools, I will stand by my statement that good restorers can make it undetectable to TPGs...maybe not museum folk, but TPGs simply aren't museum folk.

[drcy]

Originally Posted by rainier2004

Alright, it sounds like David knows much more than myself but I do not think TPGs are using the equipment that he is referring to...maybe I'm wrong, but I've never seen anyone use more than a 80x loupe, black light and some computer technology. So in that regard, with those tools, I will stand by my statement that good restorers can make it undetectable to TPGs...maybe not museum folk, but TPGs simply aren't museum folk.

I agree, and that's kind of what I've said throughout the thread. However, black light, opacity (see through effect) and gloss examination are simple but effective methods for identifying alterations such as built up corners. Simple methods combined be more powerful that one advanced test.