B07 · Reference edition 2026.11
Four-flap folders — Layout and sequence
A four-flap folder encloses a flat item through an ordered sequence of folds. The overlap arrangement determines access and closure.
Scope and purpose
Place the relevant elements in a visible order before completing the record. A diagram should distinguish position from sequence and should preserve the orientation used in the written notes. Review the example for a practical way to make the relationship explicit.
Working notes
This collection describes enclosure forms, access routes and documentation practices for paper-based material. It is intended for reading and planning, not for directing treatment of fragile objects. Fold diagrams and record examples are original illustrations with no associated collection or accession data. Material descriptions distinguish observed features from documented properties. Decisions about a real object, its condition and its environment require the relevant professional judgement.
Practical example
Number the lower, side and upper flaps on the reference diagram.
| Reference record | Interpretation |
|---|---|
| B07 | Four-flap folders |
| Scope and purpose | A four-flap folder encloses a flat item through an ordered sequence of folds. The overlap arrangement determines access and closure. |
| Limits and interpretation | A closure sketch does not establish the suitability of a board or adhesive. |
Review checklist
Identify the starting condition; mark the order or orientation; check that labels in the figure match the accompanying table.