Tuesday, July 30, 2013

Slide Scanning Tips

When I was an undergraduate student I worked in my college library’s Visual Resource Collection in a somewhat similar position to the one I’m in now. The VRC was primarily a resource for my school’s Art History Department (my major), and their main asset was row upon row of metal filing cabinets filled to the brim with 35mm slides.

As the years went on, we unsurprisingly saw more and more art history professors moving towards digital teaching tools. As such, the VRC department had no choice but to move with the times and focus on the digitization of their existing collection.

This was my first experience scanning 35mm slides, and while it fundamentally follows the same principles as scanning anything else, there are some considerations to be made. The main question is one of scanner preference: mechanical feed or flatbed?

Nikon Super COOLSCAN 9000 ED; a professional-quality mechanical feed slide and negative scanner I used at my previous job. Image copyright Nikon USA.

Mechanical feed slide scanners have several distinct advantages: they are smaller and very easily portable; they are often designed to accept large batches of scans in a workflow environment; and they require very little adjustment or calibration on the user end. However, there are drawbacks as well. Much like the mechanical feed photo scanner, it is prone to dust. This dust is significantly more troublesome in the final product due to the small size of the originals. Additionally, the user-friendliness can sometimes translate to poor customizability. And of course, the slide scanner’s utility is limited to 35mm slides or film negatives.

The Epson Expression 10000XL, with transparency unit and slides ready for scanning

While flatbed scanners are designed with larger printed material in mind, often times these too can accept slides or photo negatives with certain peripheral attachments. In the Dartmouth Library Digital Production Unit, our Epson Expression 10000XL flatbed scanner has such attachments. The biggest and most crucial is the transparency unit. This piece replaces the original scanner cover with what is essentially a lightbox, backlighting the slides and providing consistent illumination. Additionally, there are slide and negative holders that help keep your images consistent.

The biggest drawback to the flatbed scanner is that sometimes the scanner itself has not been designed for the high-resolution settings required to scan such small objects at archival quality. Usually a good resolution for 35mm slides is 2,400 dpi; four times the resolution of our usual scans. A good high-quality scanner should have no problem with this, but many consumer-level scanners simply can’t scan a resolution that high.

While our Digital Production Department has not had much reason to incorporate slide and negative scanning into our workflow thusfar, it can’t hurt to be prepared for whatever digitization projects come our way.

Tuesday, July 16, 2013

Personnel Announcement: Conservation Intern


Please welcome Lizzie Curran as the Preservation Services Summer Conservation Intern. Lizzie has completed one year in bookbinding at North Bennet Street School in Boston and is a graduate of Bennington College where she focused on visual arts, specifically drawing and painting.  While Lizzie is here for the next eight weeks she will focus her time learning about conservation practices within a library context and will explore a variety of conservation treatments. As a side, she grew up on a horse farm in Concord, Mass and loves avocados.

Deborah Howe
Collections Conservator

Tuesday, July 2, 2013

Variety Pack

The conservation lab receives items needing treatment in a variety of ways. For general circulating collections we rely on a user based system. The circulation staff is trained to recognize damaged material when the books are returned from the patron. This affords us a wide range of material that comes to us for repair. In any given day we receive the damaged items that are getting checked out within the library system.


Above is the current lineup of material to be repaired. Among the items received for repair this week are the very common 20th and 21st century books needing basic spine repairs. But as you can see we also get older paperbacks and publisher cloth bindings.


Here we have a selection of popular novels along with paperbacks and a quarter leather binding, which we will look at closer later.


We also receive items that we have previously treated, but which have failed. Here is a pamphlet where the sewing has come undone.


Also, it is not unusual to see repairs that have been done by our patrons. Here electrical tape was used to hold the spine together. Little did they know that there is a conservation lab here to take care of these problems.


This book has a pretty spine.


Here is the front of the quarter leather binding.


This has an interesting board attachment. The book is sewn on tapes which are laced into the boards. It is a tight back and has clearly gotten a lot of use.


This is the title page.


This gentleman seems to be having a good time! The book is brittle so it will go through a review process to determine if we still want to keep it in its physical format or migrate the contents to a digital format. The decision is up to the bibliographer of the subject field.

So like any conservation lab receiving a variety of materials, it is always interesting to see what might be on the shelves next!

By Deborah Howe