Storage and Handling |

You might know the importance of a protective enclosure, but how often to you consider the quality of storage materials? In fact, the composition of storage materials plays a significant role in the preservation of archival collections. But how?
Since storage plays a passive role, the positive and negative interactions of storage materials may not be readily apparent. Chemical reactions that occur between library and storage materials are often a slow process, spanning over a number of months or years before a visual change occurs. Without the gratification of seeing immediate effects, many may not realize how some storage materials can be problematic, let alone the ramifications for using non-archival materials.

To illustrate some of the effects, I thought I’d share a vivid example of protection from acidic materials during storage. The following photograph shows the positive effects of archival buffering paper (also known as interleaving), as well as the danger of using non-archival boards and tapes – even when they are not in direct contact with the object!
The protected object is a 17^th century printed broadside. It’s a single sheet of paper with printed black text on the front. The broadside was stored for many years in a green cloth-covered portfolio.

Within the portfolio, the broadside was secured beneath with folded sheets of plastic film with a blank sheet of paper. You can see the plastic film is attached to the portfolio around the edges with green tape.

This image shows the front of the blank sheet of paper stored side the plastic film, below the broadside. The plastic has yellowed overtime.

Here, the blank sheet is removed, revealing yellowish-brown discoloration around the top and right edge. This discoloration aligns perfectly with the green tape that is adhered on top of the plastic –located on the top and right side of the plastic.

When you flip the paper over, the back of the blank sheet shows even more discoloration. In fact, the discoloration is a mirror image of the materials below the plastic! This has occurred because the plastic is “breathable.” The materials below are all acidic, except for the white fragments of paper, which protected a portion of the paper from turning brown.

The interleaving paper served two purposes here:

Acts as a support for the broadside when handled.
The interleaving served as a sacrificial barrier that absorbed the bulk of acidic off-gassing from the non-archival paper and tape.

In summary, this enclosure is an excellent example of how different materials can interact with one another in nuanced ways, and how plastic is actually a permeable barrier to gasses overtime!
General storage tips:

When placing interleaving within an archival polyester L-sleeve, make sure the interleaving tissue is larger than the object so you can avoid localized discoloration
Architectural prints, blue prints and some photographs are special. Don’t store these in buffered materials (materials that are above pH 7). Store them with pH neutral materials like polyester film or unbuffered paper.
Check out these resources on selecting archival storage materials:
- Connecting to Collections’ Collections Care Basics: Where Do I Begin?
- National Park Service :
  - Buffered or unbuffered?
  - Blue prints and cyanotypes
- Canadian Conservation Institute (CCI notes):
  - Black and white photographs
  - Color photographs
- Sources for purchasing archival materials:

Ashleigh Ferguson Schieszer (PLCH) —- Book and Paper Conservator

Stack shifts and moves are an inevitability in libraries. Collections change. Spaces change, more often than not becoming too small for the collection(s). And in the end a shift of collections is imminent. For most collections these stack shifts do not require the intervention of a conservation lab. Periodical bindings moving to another floor? It happens all the time and that’s that. But when special collection items are shifted or moved, the Preservation Lab generally plays a part. So when UC’s Archives and Rare Books Library decided to move and shift the bulk of their oversized special collections between stack levels the Lab was contacted to play a part in the prep work.
The plan? To measure and box as many unstable or unwieldy oversized books that will be moving between floors or shifting within narrow, restrictive shelving stacks before the move in April. In order to keep our current workflow of treatments (both general circulating and special collections) for both institutions going, it was decided that a couple of lab staff would measure the books on-site (ARB Library), have corrugated enclosures created through our commercial bindery vendor, and then as the boxes were received the staff would match up the books with the boxes. Three staff members, Holly Prochaska (librarian), Veronica Sorcher (technician), and myself, took on the duty of assessing the books and taking measurements for those we felt could easily hinder the move or be damaged further by handling and moving.

Measuring in the stacks and making do with the space you have.

At this point we are about half way through the process. We’ve measured over 750 books for enclosures! We enlisted one of our trusty student assistants to record all the data so that we could send it off to the commercial binder. The first batch of 150 boxes arrived and were matched up with the books earlier this week. And luckily, our error rate was actually very low, even with that first batch where we were still figuring out the kinks of measuring in confined spaces and often dim lighting!
What’s the workflow like? Each person has list of numbers that correspond to the number the binder prints on the inside of the enclosure, per our request. For each number, the staff member records the call number (to be printed on the spine of the box), along with the height, width and thickness of the book. A flag with that number written on it (in pencil, of course) is then placed in the book so that it is visible on the shelf and clearly recognizable when matching the boxes to the books. So far, the process has worked pretty well.
What kinds of things are we prepping for storage and handling? Prime candidates for move-prep housing include…

Any book previously tied with cotton tying tape, usually to hold a detached/loose board or textblock in place.

In this case, boards were detached from the spine/textblock. But let’s just talk about the reason I really took a photo of this book on Christopher Columbus…the anchor clasps and catches! How cool are those?

Any book with loose, detached, or protruding parts that could be abraded, damaged further, or lost during the move.

When I originally pulled this book off the shelf the measure it the corner was nowhere to be found, but I found it a couple shelves down resting on top of another book.

Any extremely fragile or flimsy books, including extremely oversized, thin bindings or bindings with fragile paper or degraded leather covers.

This full leather binding must have been fire damaged at some point. The leather on the spine was so fragile and would crack and break if you looked at it the wrong way.

The evil monster known as RED ROT!

Obviously not all books with red rot were boxed, especially those with very minor cases. But books like this, where the movers and every book in the surrounding area would be covered in a red layer of degraded leather…those get boxes!

If you’re interested in seeing more snapshots from our adventures of measuring in ARB, check out the Preservation Lab’s Instagram, here.
Jessica Ebert (UCL) – Conservation Technician

A Blog of the Preservation Lab at UC

Tag Archives: Storage and Handling

The Protective Power of Interleaving

Prepping for a Shift