IPI Photographic Processes Identification Workshop

Last week, I attended a 3-day workshop in identifying photographic prints at the Chicago History Museum. Developed by the Image Permanence Institute, this was an intensive and incredibly helpful opportunity. Two staff from IPI led the sessions - Jae and Alice - and each day alternated between lectures and hands-on activities. After each lecture, we were able to work with the teaching collection, walking through the methodology we were taught to properly identify the images. This really helped to reinforce the ideas presented, especially by working with a partner to talk through what we were seeing.

Our first day was dedicated to an overview of the development and challenges in creating photographic images. The framework for the rest of the workshop was also established via an introduction to a visual identification guide. This checklist helps establish a methodology to looking with the aim of identification, by inspecting: image content, primary support, image color and tone, image deterioration, surface sheen, image structure (continuous tone or patterned), and layer structure. These visual cues align with the content of Graphics Atlas, an online resource provided by IPI. This way of walking through prints, starting with overall observations and gradually working towards magnification, proved to be very helpful throughout the sessions. They also discussed the earliest processes from the 19th century. We covered photographs on rigid supports - Daguerreotypes, ambrotypes, and tintypes - in addition to silver based printed-out prints on paper - salted paper, albumen, collodion, and gelatin prints.

19th century processes

19th century processes

The next day was spent reviewing non-silver based printed-out prints on paper - carbon, cyanotype, and platinum prints. The rest of the session was spent moving forward into the 20th century, focusing primarily on the most common black and white print form of the century - the silver gelatin developed-out print. After learning about this highly variable print type, Jae and Alice introduced us to color photographic prints - autochrome, carbro, dye imbibition, chromogenic, silver dye bleach, and diffusion transfer prints. We rounded out the day by reviewing the non-photographic counterpart to all the processes we had learned up to this point - photomechanical prints. These included Woodburytypes, photogravures, rotogravures, collotypes, letterpress halftone prints, and offset lithography prints.

Comparing bronzing with an overexposed POP print with silver mirroring on a degrading DOP print.

Comparing bronzing with an overexposed POP print with silver mirroring on a degrading DOP print.

20th century process: silver gelatin DOP

20th century process: silver gelatin DOP

The last day moved us into the 21st century and digital printing technologies - inkjet, electrophotography, and dye diffusion thermal transfer prints. We put all our knew knowledge to work by working through the identification of ten prints, which ranged from the earliest to the most contemporary processes. It could have been overwhelming, but knowing the steps helped guide the process. And it was just as helpful to incorrectly identify prints, as Jae and Alice then provided us with additional help on how to get to the right answer. My partner and I went through several packets of prints, and we felt fairly confident by the end! We also had the opportunity to look at some of the photographic prints in the collection at the Chicago History Museum. It was nice to ground everything we had learned with these samples - these are the types of prints we are likely to encounter in the future, and may have to identify without the assistance of our IPI experts.

Teaching collection test!

Teaching collection test!

I went into the experience hoping to gain some greater understanding of print images, and I was floored by how much content we covered, and how effective the instruction and format of active learning were. I still have much to learn, but I am so grateful for the opportunity to get this crash-course in photographic (and photomechanical) print identification.

Print viewing in archival storage at the Chicago History Museum

Print viewing in archival storage at the Chicago History Museum

Early processes in CHM’s collection

Early processes in CHM’s collection

A later process in CHM’s collection

A later process in CHM’s collection






Smithsonian tours

Last month, I traveled to Washington D.C. for the IS&T Archiving conference. I headed out a few days early in order to meet with a couple of archivists at the Smithsonian. My first stop was the Smithsonian Institutional Archives, and my second stop was the National Anthropological Archives.

I met with the photography archivist, Marguerite Roby, at the Institutional Archives, and it was incredibly helpful meeting with someone managing collections so similar to those I’m overseeing at the Art Institute of Chicago. We discussed issues we’re currently facing, and she provided suggestions based on similar challenges she’s encountered. She stressed finding an approach and sticking to it, for consistency it’s not about the perfect solution, rather one that will work in most situations and will produce repeatable results. She also encouraged our department to work collaboratively with other departments to learn more about our materials, and to foster institutional ownership of the collections.

She also provided the history of the Institutional Archives, whose complicated past mirrors our story. With institutional archives, especially photographic material, it seems as though the distinction between “working” and “archival” material is often hard to make. At AIC, this is reflected in the fact that the Imaging department, that which is currently making new documentation for the museum, is still tasked with managing all historical photographic documentation. At Smithsonian, progress has been made in the form of one centralized repository for all institutional documentation, but there is much work to be done to sort and catalog a legacy of inconsistent management. It was eye-opening hearing her thoughts about the unique challenges embedded within photographic institutional archives, which I’ve felt intuitively, but have never been able to pinpoint exactly.

Additionally, we talked shop about image records, metadata, information management systems and workflow, storage, and digitization. While Marguerite is dealing with a scale of material that far surpasses our collections, learning about the ways in which our day-to-day work is similar and differs gave me ideas on what we can improve. It confirmed areas where we’re on the right track, and areas that need more attention. We also toured the on-site storage in the Smithsonian Institutional Archives building in D.C. The majority of photographic material is located elsewhere, but I was grateful for the opportunity to take a look at some of their archival material. One item in particular, the custom slide cabinet and vertical viewing station, caught my eye.

It was wonderful discussing archives, and institutional archives in particular, with a professional with so much experience and knowledge.

Storage in the Institutional Archives office building

Storage in the Institutional Archives office building

Slide storage and viewing cabinet

Slide storage and viewing cabinet

Custom housing for glass plate negatives

Custom housing for glass plate negatives

Material to-be-sorted from a departing Smithsonian staff member

Material to-be-sorted from a departing Smithsonian staff member

The next day, I met with photograph archivist Gina Rappaport, who manages the National Anthropological Archives. Her office and storage are located in one of the off-site facilities outside Washington D.C. - one of the warehouse spaces I’ve long wanted to visit.

She told me about the Archives’ long history and how ownership and management as shifted over the decades. Paralleling the Institutional Archives, and our own, it’s interesting to learn how common a reality this is for archives - and it’s a reality which has a huge impact on archivists’ work. Uneven oversight results in piecing together puzzles and backtracking to revise work previously done. This is further complicated with Gina’s material, since there are so many different creators. Institutional archives can be considered mainly in terms of the institution itself as creator and subject, but more traditional collections like the National Anthropological Archives have unique creators and subjects.

We discussed physical and intellectual organization of the archives. She helped answer some of my questions about the utility of creating finding aids for our collection, and how to go about resolving physical reorganization which has resulted in a loss of information about material. These management issues made it clear how important it is to have trained archivists overseeing materials like these. While interpretation of collections is good, it can’t happen without measures in place which allow for the safe storage, retrieval, and care of these materials.

She led me on a tour of some of the photographic archives storage space in the building, as well as some of the general museum collections storage, primarily for the Smithsonian National Museum of Natural History. The building has been custom designed to maximize storage space, with 435,000 square feet dedicated to the collections. This includes rows upon rows of stationary and compact shelving units filled with historic negatives and prints. The photographic archives are beautifully housed, and Gina discussed their good fortune of having volunteers dedicated to making custom housing for unique or unstable materials. This includes floating mylar supports so researchers can look at original negatives without having to touch them. They also have extensive cold and frozen storage both on- and off-site, and a comprehensive digitization program.

These more traditional archives gave me a better sense of context about archives on the whole, and the ways in which our institutional archives fit in the larger field.

One small section of photographic archives storage for the National Anthropological Archives

One small section of photographic archives storage for the National Anthropological Archives

Nitrate negatives, soon to be stored in freezers

Nitrate negatives, soon to be stored in freezers

Custom housing for glass plate negatives: mylar support to allow viewing and reduce handling

Custom housing for glass plate negatives: mylar support to allow viewing and reduce handling

I’m incredibly thankful for the chance to spend so much time talking to these archivists, and for the opportunity to tour their facilities and see their collections. The field of cultural heritage is perpetually overworked and understaffed, so it’s a testament to the generosity of staff like Marguerite and Gina to take time out to meet with me. I learned so much from both of these visits, and I’ve made some valuable professional connections. I hope that I’ll be able to pay it forward in the future, especially once I have more formal archival training under my belt.