The Bigger Picture: Visual Archives and the Smithsonian
Posts tagged with: Conservation
Between September-December 2015 I had the opportunity to undertake a research project on the conservation of eighty letterpress copying books of Spencer Fullerton Baird (1823-1887), preserved in the collections of the Smithsonian Institution Archives (SIA) RU000053, under the supervision of Senior Conservator Nora Lockshin.
The Baird volumes are currently restricted for use (although greatly desired by researchers) because the collection is affected by a severe iron-gall ink corrosion and ink fading. Microfilm is available, but is not entirely legible.
In 2011, Smithsonian Postgraduate Fellow Beth Antoine analyzed the Baird’s letterpress copying books, and investigated conservation treatment using antioxidant tetrabutyl ammonium bromide (TBABr) and raised new research questions in her conclusion. My project proposed to design experiments for the new research questions : to compare two non-aqueous conservation treatments; and to develop risk assessment and practical workflow guidelines, in order to stabilize and digitize the collection in the future. I took into consideration the further developments in the conservation of iron gall inks since Antoine’s publication, so I designed a study to investigate three major new research questions related to the conservation of letterpress copying books.
First of all, I further analyzed the effects of TBABr on the paper and compared also treatments with another similar antioxidant: 1-ethyl-3-methyl imidazolium bromide (EMiMBr). Secondly, in the meanwhile, I experimented with different sizing agents and repair tissues both commonly used in conservation or recently developed, such as an Avanse/Plextol heat-set tissue studied by the National Archives and Records Administration. Finally, I investigated the application of the best materials on the volumes with the use of a book suction machine, to minimize risks for the collections and the conservator during conservation treatments.
Different combination of materials were tested on paper strips sacrificed from one of the Baird volumes from unused sheets at the back of volume 4. Moreover, I created mockups with a gampi paper, which is similar to the original types of tissues that were used to create copying books, and three different inks (with different solubility characteristics ) that simulate inks that were used in writing letters copied into letterpress copybooks.
To check the results of the treatment and predict their behavior over time, I put the mockups through artifical aging studies, measuring the following factors: the acidity or alkalinity levels (pH), color change using a colorimeter (in CIEL*a*b* colorspace), migration of iron (II) ions, tensile strength of the samples, and visual examination under ultraviolet light.
The tests were conducted in two different locations: the conservation laboratory of the Smithsonian Institution Archives and the Mecklenburg Materials Archive facility at the Smithsonian’s Museum Conservation Institute.
At the end of the tests, we discovered that, if combined with deacidification, Bookkeeper (a proprietary deacidification solution), and either of two possible sizing agents, the antioxidants TBABr and EMiMBr are effective in stabilizing degraded inks of letterpress copybooks, and the behavior of the two is very similar. However, it is necessary to test the solubility of the inks extensively before planning any treatment. Concerning repair tissues, we selected three possible heat set/solvent set tissues that may be used to stabilize tears and losses. By using a suction table and turning the pages gently with Mylar/Melinex sheets, it is possible to effectively stabilize pages of letterpress copybooks that are affected by severe tears and losses. The results of this research project will help the conservators of the Smithsonian Institution Archives in planning a stabilization and digitization project for the Baird letterpress copybooks over the following years. Moreover, the findings will help archivists and conservators of other institutions in the United States and abroad in preserving this kind of archival collection. A poster of the project will be presented at the American Institute for Conservation 2016 joint annual meeting in Canada.
I wish to thank the Anne Van Camp, Director of the Smithsonian Institution Archives, Nora Lockshin, Senior Conservator at the Smithsonian Institution Archives, Eric Woodard, Director of the Office of Fellowships and Internships, and Dawn V. Rogala, Paintings Conservator of the Museum Conservation Institute for their support of this project. As an emerging Italian paper conservator, completing this research was an extraordinary opportunity to grow professionally and personally, in a rich and stimulating environment!
Record Unit 000053 - Spencer Fullerton Baird, Smithsonian Institution Assistant Secretary in charge of the United States National Museum, Correspondence and Memoranda, 1850-1877
"The Conservation of Letterpress Copying Books: a Study of the Baird Collection." Antoine, Beth, Mecklenburg, Marion F., Speakman, Robert J. and Wachowiak, Melvin J. 2011.The Book & Paper Group Annual, 30: 9-27
In November, Smithsonian Institution Archives successfully moved over 3 million photographic negatives from a cold storage unit that had reached end of life to a new state of the art facility at the Smithsonian Institution Support Center (SISC) in Hyattsville, Maryland. The new space consists of two climate and humidity controlled rooms, a large staging area, and a large processing and digitization lab. Of the new cold rooms, one is kept at 52 degrees Farenheit and accommodates glass negatives, color photographic prints, CDs, and videotape materials, while the other is kept at 26 degrees Farenheit and is for storage of film materials.
We inherited both the old space and the glass negatives in 2008, when the Archives took over all of the historic images pertaining to the Smithsonian Institution’s history from Smithsonian Photographic Services (SPS). Located in the basement of the National Museum of American History (NMAH), the old cold vault, which had prevented the deterioration of film material for over thirty years, was on the verge of expiration.
For years we have been preparing the contents kept in cold storage for the move, which not only included the design and build out of a new space, but also some huge rehousing efforts. Over one thousand broken glass negatives were stabilized, housing was provided for oversized glass and acetate negatives, and 30,000 glass negatives were separated from the acetate negatives they were originally stored in boxes with. Once the build out was nearing completion, new locations for the materials were mapped and labeled.
The actual move took place over five days. Four Archives staff members were at each location with a move crew of about six to ten, and three refrigerated trucks shuttled material from NMAH to SISC. The move “choreography” consisted of 38 main steps, each divided into numerous sub-steps. In addition to the Archives’ collections, we also moved collections for other units with whom we share the space and whose collections we will continue to store.
Our new space affords us some room to grow. Though we cannot accommodate all of the Smithsonian Institution’s film preservation needs, we are able to bring on new partners and collaborators from units across the institution to provide preventive care for collections at risk. We look forward to working more closely with our historic collections and have plans to systematically digitize materials so that we can share and provide access to the Smithsonian Institution’s fascinating and abundant photographic history.
Cabinet of Curiosities, The Bigger Picture blog, Smithsonian Institution Archives
Unlocking the Vault, The Bigger Picture Blog, Smithsonian Institution Archives
Walking on Broken Glass, The Bigger Picture blog, Smithsonian Institution Archives
Highlight from the Photo Cold Vault: Gelatin Dry Plate Negatives, The Bigger Picture Blog, Smithsonian Institution Archives
Putting It All Together: The Assembly and Rehousing of Glass Plate Negatives, The Bigger Picture Blog, Smithsonian Institution Archives
Care, Handling and Storage of Photographs, Library of Congress