[CowboysGuide]

Sorry if this isn't the best place to pose this question.

How are professional card grading companies supposed to handle print marks if they exist on all 'known' examples of the card? Is it assumed by them that a perfectly clean card does exist?

I've been reading this forum for a while and really enjoy all the expert opinions and seeing some extremely rare stuff. Even though I am a football card/memorabilia collector, I've learned a lot here that can be applied to my collecting habits.

Thanks in advance...
Steve