Hi folks, I keep all my coins in 2x2 cardboard holders, but I am a little slow sometimes when I new coin arrives. I work full time in a hospital and have a young daughter so finding time sometimes can be tricky. Does anybody know how long a coin can be kept in either the pvc pouches or small ziplock bags, that coins very often arrive in from ebay, without damaging the coin? Just out of curiosity, ive read that pvc and other materials can damage coins over tine, what damage is actually caused? Many thanks in advance. Charlie