Archival Storage
Unframed posters should be stored flat or rolled, never folded. Use acid-free interleaving tissue between posters stored flat, and always keep them in a cool, dry environment away from direct light.
Framing
For display, conservation framing is essential. This means UV-filtering glazing, acid-free mounting board, and a mount that keeps the poster from touching the glazing surface. Never dry-mount or wet-mount an original poster — this is irreversible and destroys value.