9 Foldable: Letterlocking Instructional Resources for Brienne DB1627

Offering instructional resources for the '9 Foldable' letterlocking model, specifically modeled after the historical Brienne Collection artifact DB1627 (UH0217). Created by Jana Dambrogio and last updated in March 2026, it serves as supplemental material for research into the automated virtual unfolding of sealed documents using X-ray microtomography.

Use Cases

• Validating virtual unfolding algorithms against the known geometry of the 9 Foldable model
• Reconstructing historical document security features based on Brienne Collection DB1627 specifications
• Benchmarking X-ray microtomography reconstruction accuracy using physical fold patterns

Strengths

• Directly modeled after historical artifact DB1627 from the Brienne Collection
• Provides ground-truth reference for X-ray microtomography unfolding algorithms
• Interdisciplinary utility for both computer science and archival research

Limitations

• Unknown record count and specific file formats
• Highly specialized scope focused on a single folding pattern
• Lack of descriptive metadata for individual files within the resource

Provenance

Source

Jana Dambrogio, 'Unlocking history through automated virtual unfolding of sealed documents imaged by X-ray microtomography'

Collection Method

Expert-modeled based on historical archival artifacts

Freshness

Last updated 2026-03-05.