I am trying to take good care of my boyfriend's stamp collection, which he got from his grandfather. There were simply piles and piles of stamps in a box - mostly connected to the envelope. His grandfather had cut around the postmark for each one.
I found they fit quite nicely into acid-free plastic sleeves meant to hold business cards, in a 3 ring binder. I now have four large 3 ring binders full of these sleeves, with the stamps in them. Is there any danger in me doing this?