Besides the codex, we also encounter pamphlets, limp paper bindings, newspapers, etc. Sometimes these materials have some damage, but do not warrant intensive repair. In those cases, we can often provide support by encapsulation in a Mylar envelope. This envelope enables you to view the materials, remove them for handling, and keeps them protected and flat (with a 20 or 40 point board for support).
This particular book was stapled at the spine. The staples had rusted away, but the pages were still collated and in tact. The book had also been stored folded.