Would a trusted Canadian company that has been manufacturing coin albums for over 25 years still be unaware of the damage that PVC causes to coins? I find this highly unlikely. But if someone has proof that these albums do in fact contain PVC then I will be making a phone call and demanding a refund from Uni Safe.
Perhaps they've changed the way they manufacture their albums over the years. If I could show you how the coins my dad's albums from the 80's looked, you'd definitely think twice about storing any coin that contains silver in them. Come to think of it, some of the nickel coins have also show signs of that blue-green gunk.
I'll be transferring the contents of his old albums to brand news ones, but not the silver coins. Those I have decided to encapsulate instead.