Quote:
Originally Posted by ls7plus
I think most of us have cards over 100 years old, and these have some wear due to handling, but really haven't deteriorated due to the passage of time. I'm with Leon: they'll very likely last far, far longer than any of us. decades, centuries, milleniums?
Best to all,
Larry
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The concern isn't for cards in general, but for cards printed on more acidic cardboard AND housed in a holder like a grading slab that has limited air flow to allow gasses from decomposition to get out.
Whether that's actually a concern or not is hard to say. I'd love to see some before and after pictures of cards on fairly bad cardboard that were graded very early on. I'd be surprised if photos like that exist, but maybe for something like a 52 Mantle there would be auction pictures.
Of course they could slab a few sample cards with a test strip and see what happens over time. But I'm not sure any of the 3 main companies would do that.
Steve B