B20 · Reference edition 2026.11
Phase boxes — Review and interpretation
A phase box is a protective enclosure whose dimensions and closure depend on the stored form. Record the flap sequence explicitly.
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
Keep the object orientation identical across the measuring sketch and folding record.
| Reference record | Interpretation |
|---|---|
| B20 | Phase boxes |
| Scope and purpose | A phase box is a protective enclosure whose dimensions and closure depend on the stored form. Record the flap sequence explicitly. |
| Limits and interpretation | The term does not certify a material or guarantee long-term preservation. |
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.