I just went looking through some of my coin books and have found a green tint on about a dozen coins. I know I would not seal them in cardboard if they looked like they do now....So I am wondering what caused this? Maybe I did not seal them in their cardboard good enough? Could it be the tape itself doing this? What do you guys think and also how can I get the green "stain" off of these coins?
The plastic window on 2x2s are Mylar and won't react with your coinS. It might be the tape or the coins could have been stored in PVC flips before you got them. A short acetone soak will get rid of any PVC plasticizer residue (don't use nail polish remover). There are lots of threads in the archives explaining the safety precautions when using acetone. Read them if you aren't used to working with chemicals as its very flammable, and can ruin some types of countertops and plastic pipes.
I did stop using tape cpm9ball....Only use staples now....These coins came out of a old book(s)... Gonna have to start replacing the taped 2x2's with new ones and seal them with staples....Anyone have stock in staple companies? If not I suggest you buy some...
