Quote:
Originally Posted by tschock
Steve,
I wondered that myself. Even if the plastic in which the card is entombed were not in and of itself harmful to the card in the long term (is the plastic used similar to mylar or acid free?), but are we essentially creating a self-feeding acid bath for the cards with the little bit of air that is also encapsulated?
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The slabs themselves are probably polycarbonate (Lexan) and should be somewhat archival. Maybe not quite as good as Mylar, but still just fine for most things.
Steve B