B10 · Reference edition 2026.11
Four-flap folders — Review and interpretation
A four-flap folder encloses a flat item through an ordered sequence of folds. The overlap arrangement determines access and closure.
Scope and purpose
Review the record before drawing a conclusion. Look for missing context, ambiguous labels and claims that exceed the evidence. The purpose is to identify what can be understood from the record and what still requires a separate assessment.
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 |
|---|---|
| B10 | 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
Read the record without relying on memory; check every label; identify uncertainty; decide whether a specialist review is required; retain the original observation.