Posted By:
barrysloateJim- it would be impossible to know the number of bad cards that may be holdered, and I agree that anyone who throws out a percentage is just guessing, with no proof whatsoever.
But to look at this from a different perspective, I can say with confidence that a skilled paper conservator can perform such sophisticated work on a baseball card that it would be extremely difficult to detect. And you can be certain that where there is big money to be made, cards will continue to be worked on and improved.