Posted By:
AnthonyE Card-
Here's the link to the "experiment with pro"
http://www.brucemo.com/cards/articles/pro/
if you back the url a bit and get to his main card site there are some methods of removing cards from slabs, and an interesting one where some cards that were loose in the slab were put in a paint shaker and a clothes dryer to see if the card could be damaged.