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Industry

Heritage, library and media archive digitization

Archive and library digitization is a preservation exercise before it is a scanning one. The material is unique, often fragile, and sometimes unplayable on equipment the institution still owns. The work produces a preservation master held for the long term and a lighter access copy for readers, described well enough that somebody can actually find it.

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Documents handled

  • Bound volumes, rare books and manuscripts, including Arabic manuscripts that cannot be unbound under any circumstances
  • Newspaper and periodical runs, usually oversized and usually brittle
  • Photographic prints, negatives, transparencies and glass plates
  • Maps, charts, plans and architectural drawings held as heritage rather than working items
  • Oral history recordings on cassette, reel to reel and minidisc
  • Broadcast video on Betacam, U-matic and VHS
  • 16mm and 35mm film
  • Microfilm, microfiche and aperture cards
  • Card catalogues, accession registers and finding aids that describe the rest of the collection

Common challenges

  • The item is unique. There is no second copy if handling damages it, which changes every decision about speed.
  • Bound and brittle material cannot go near a feeder, so throughput is a fraction of office scanning and the estimate has to say so.
  • Magnetic tape degrades whether or not anybody plays it, and some formats are already close to unrecoverable.
  • The equipment needed to play obsolete video and audio formats is scarce, ageing and getting harder to service.
  • Descriptive metadata to an archival standard takes longer than the capture and is what makes the collection usable at all.
  • A preservation master and an access copy have genuinely different specifications, and conflating them wastes either storage or quality.

Security considerations

  • Custody rather than confidentiality is the dominant risk, because the items are irreplaceable and insurance does not restore a manuscript
  • Condition reporting item by item, before and after handling, as a standard deliverable rather than an extra
  • Environmental control in the working area for fragile paper, film and photographic material
  • No destructive preparation of any kind: nothing unbound, nothing trimmed, nothing flattened under pressure
  • Transport and insurance arrangements agreed in writing before a single item moves, or capture performed entirely on site
  • Item-level access rules where a collection includes personal, restricted or culturally sensitive material

Typical integrations

  • Library management systems and public catalogues
  • Digital asset management and media asset management platforms
  • Institutional repositories and digital preservation systems
  • Metadata schemas and harvesting arrangements the institution already uses
  • Reading room delivery and public access portals

Every other page on this site is about records that exist in quantity and are valued for what they prove. A heritage collection is the opposite: items that exist once, valued for what they are. That inverts almost every assumption behind commercial scanning. Throughput stops being the measure of a good day, and the question shifts from how fast to how safely, and to what standard.

Two outputs, not one

Preservation digitization produces a master file captured at the highest quality the item and the equipment support, held uncompressed or losslessly, intended to outlive the equipment that made it. From that master come access derivatives: smaller, compressed, delivered to readers over a network. Institutions that produce only a web-sized JPEG will be doing the whole exercise again in fifteen years, and the item will be fifteen years more fragile when they do.

Source formats, the risk each carries and what a project produces from it
Source formatPrincipal riskOutput
Bound volume or manuscriptSpine damage from forced opening; nothing may be unboundOverhead cradle capture at a supported opening angle, master plus access copy, page-ordered
Newspaper runBrittle, oversized, tears at the fold on handlingLarge-format capture with a condition report per volume, and a decision recorded where an issue is too damaged to capture safely
Photographic negative or glass plateSurface abrasion and, for glass, breakage in handlingTransmissive capture with the tonal range of the original retained rather than auto-corrected away
Cassette or reel to reel audioBinder degradation; playback itself can damage the tapeSingle-pass transfer to a preservation audio master, with any pre-transfer treatment documented
Betacam, U-matic or VHS videoFormat obsolescence, and dwindling working playback equipmentTransfer to a preservation video master with the original timecode and any on-tape metadata retained
Microfilm, fiche or aperture cardChemical degradation, vinegar syndrome in older stockFrame-detected scanning producing individually indexed images rather than a continuous strip

Description is the larger half of the work

A digitised collection with no description is a hard drive. What makes it a resource is metadata: who created the item, when, what it is, what it relates to, and how it sits within the collection's own hierarchy. That work takes longer than capture, needs people who understand the material, and should follow whatever standard the institution already catalogues to rather than an arrangement invented for the project. Where a collection includes Arabic material, description usually needs to exist in both languages to be genuinely usable.

Finding aids and accession registers are worth capturing early for the same reason. They describe the rest of the collection, so digitising them first gives the project a map and gives readers something searchable before the main sequence is complete.

Working on site, which is often the only option

Many institutions will not permit a heritage item to leave the building, and that position rarely needs defending. Capture equipment goes to the collection instead: cradle scanners, copy stands, controlled lighting, and a working area with the environmental conditions the material needs. It is slower to mobilise and it removes the largest single risk in the project, which is transport.

Obsolete media will not wait

Paper is patient. Magnetic tape is not. Cassettes, reel to reel audio and older video formats degrade on the shelf regardless of handling, and the population of working playback machines shrinks every year along with the number of engineers who can maintain them. When a collection contains both paper and tape, the tape should usually be scheduled first even though the paper is more visible and easier to justify. The paper will still be there afterwards.

Frequently asked questions

Can bound volumes be digitised without unbinding them?

Yes, and for heritage material it is the only acceptable method. Volumes are captured on an overhead cradle that supports the spine at a limited opening angle, with no pressure applied to flatten pages. Nothing is cut, unstitched or trimmed. Capture is considerably slower per page than feeder scanning, and any estimate that ignores that difference is unreliable.

What is the difference between a preservation master and an access copy?

The master is captured at the highest quality the item and the equipment support, stored uncompressed or losslessly, and intended to outlive the equipment that produced it. Access copies are derived from it: compressed, smaller, and delivered to readers. Producing only an access copy means repeating the whole exercise later, on material that will be more fragile by then.

Can obsolete video and audio formats be transferred?

Formats such as cassette, reel to reel, U-matic, Betacam and VHS can be transferred where working playback equipment is available, with the transfer captured to a preservation master. Magnetic media degrades on the shelf and playback equipment is becoming scarce, so this work should normally be scheduled ahead of paper in a mixed collection.

Who produces the catalogue metadata?

It depends on the collection and on how much subject expertise it requires. Structural and technical metadata is produced during capture. Descriptive cataloguing should follow whatever standard the institution already uses, and is often best done by, or alongside, its own curatorial staff. For Arabic collections, description usually needs to exist in both Arabic and English to be usable.

Can the work be done inside our building?

Yes, and for irreplaceable material it is usually the right answer. Cradle scanners, copy stands and controlled lighting are installed in a working area the institution provides, with the environmental conditions the material requires. Mobilisation takes longer, and it removes transport, which is the single largest risk in a heritage project.

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