I recently started collecting and don't have anything crazy valuable or old. I was reading online about plastic that has PVC in it and how it could damage the paper. I currently just have my small collection in generic currency booklets with flexible sleeves. I am also aware of archival quality sleeves. Is this something I need to be concerned about? Even though my collection isn't worth much I want to keep it nice as it grows. How do you guys store your collections? Folders? Boxes?
This subject has been discussed here at CT before. Check out this thread, it has 60 replies. https://www.cointalk.com/threads/currency-storage.214508/