if you would like to see plenty of them, visit www.plastic-play-money.org which is my on-line collection catalogue.
good question, I guess I should have, but the answer is unfortunately 'no'. My main studies are with the degradation of plastics in museum...
in my opinion these should be ok. If they ever show signs of internal crazing or go brittle (due usually to UV) then that's the time to change them
I have examples of coin holders made from clear pvc (vinyl) that have started to degrade and give off acidic fumes which will attack coins. You...
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