Hi, Button keeping is a big subject, but using the card stock (acid free) and punching a hole into it for each button is one way. Many collectors than place the card in a plastic bag. This is good way for most buttons except some polymers such as celluloid, which must breath. It is a lot of work, but I find it protects them and I can find them more readily. Many of my friends also place their cards in file folders in their big file cabinets. Mine are in file boxes.
If you don't know what I mean about card stock, some of the eBay auctions have buttons on these large cards. You can find these supplies at the state button society clubs in your area.
Thanks - Linda at The Responder
Linda Falkenthal