I started collecting coins when I was about eight now i have just recently got back into it it and found that after about twenty years the coins in the whitman folders are getting green little corrosion on the edges. VERY BAD NEWS! I am going to take them out but how do I know if the 2x2 coin flips are mylar or vinyl ? and what about the clear binder pages 2x2 Lead Dog Brand pages I have to hold them in I don't want to make another mistake for my long term collection of a LOT of coins Thanks to all who help a fellow collector out flyingaj
