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Four-flap folders
A four-flap folder encloses a flat item through an ordered sequence of folds. The overlap arrangement determines access and closure.
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.
A closure sketch does not establish the suitability of a board or adhesive.