New to collecting- How to use currency sleeve
Hello, I have come across an old collection of banknotes from the 1930's and 1940's from my grandfather. They were simply in a lettter-envelope. I want to preserve them in currency sleeves. I ordered some currency sleeves from air-tites.com. The sleeves are open on 2 sides, with a sharp fold on the top. They gave me no instructions on how to use the sleeves. Am I supposed to seal the ends of the sleeves somehow? Or do I just slide the banknotes in and it will provide protection. My goal is long-term storage. Thanks in advance for your help.