Cracking is probably the future of all of the 3D cards. The plastic and paper age and react to conditions differently. That is why the cards tend to curl over time. As for cracking, odds are that the card had curled and the plasticizers in the plastic used to coat the card evaporated, making the plastic brittle. When the card went into the holder and was flattened, the brittle plastic started to crack and the cracks expanded over time.
Last edited by Exhibitman; 07-02-2011 at 04:57 PM.
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