Attendees of the Book and Paper Business Meeting, and other early-morning risers, were rewarded with a technical investigation of a 19th century Persian album owned by the Harvard Art Museums, presented by Penley Knipe, the Philip and Lynn Straus Senior Conservator of Works of Art on Paper and Head of Paper Lab at the Straus Center for Conservation and Technical Studies.
An exhibition scheduled at the Harvard Art Museums in 2017 will feature the album and other Qajar period work, and Knipe used this opportunity to research and document the various papers, media and techniques. The album is a carefully arranged collection of 141 drawings on paper cut and adhered onto folios of colored paper. Included are, sketches, finished drawings, and design patterns. The album will be disassembled for the exhibition, and rebound after it comes off view, allowing Knipe to complete extensive documentation and research on each sheet. Thus far she has identified seventy-seven wove sheets and forty-seven laid sheets. Twenty-six sheets contained watermarks. Surprisingly, as the watermarks were identified, it was discovered that the majority were of European origin. Seventeen watermarks were Italian, including the Magnani paper mill (Cartiera Magnani, established in the early 15th-century), two were English, and seven watermarks were from the Islamic world. All the watermarks were documented using digital beta radiography. This imaging revealed matching partial watermarks, allowing certain sheets to be reassembled, and adding more clues to the use of the paper. The variety of papers in this album, and preponderance of European papers, provides evidence for the paper trade during this period, as well as the transfer of papermaking technologies between east and west. Knipe’s research will make significant contributions to future scholarship on the history and manufacture of these papers.
After Knipe presented her exploration of the paper in the album, she focused on the techniques employed on the sheets. Many of the drawings were used for transferring images to other objects, evidenced by their pounced or inscribed lines, rubbed media, and thin/transparent quality of the paper supports. As the album was examined, it became clear that the drawings were arranged according to degree of use, and many had not been used at all. Knipe linked some of the patterns to objects bearing very similar designs, and illustrated this by showing us a (transferred) drawing of a long floral pattern next to an image of a lacquered pen box.
Investigation of the various papers and transfer techniques became a teaching tool for a graduate seminar in the Materials Lab at Harvard Art Museums where, over multiple sessions, the materials’ fabrications and use were explored through hands-on activities. The author had an opportunity to visit the Materials Lab after the 44th Annual Meeting, which is stocked full of artists’ materials for a variety of techniques in all media: from screen printing, to ceramics, to gilding. The benefit of teaching with real materials, and practicing the methods firsthand, is clear; for example, sight nuances, such as the manner in which “red chalk” rubs into and stains thin paper is directly observed and becomes much more easily recognizable in actual drawings. Knipe expanded on these practical sessions by leading a graduate seminar later in the year that explored both the media and the papers comprising the album.
Knipe’s research will be incorporated into the upcoming exhibition, where the technical results will be shared online and through gallery talks. In the meantime, high-quality, digital images of the album pages are available to explore online: http://www.harvardartmuseums.org/search-results?q=1960.161.
Category: Specialties
44th Annual Meeting – Paintings Session, 15 May 2016, "The Mellow Pad in layers, colors, and time: investigating the materials and technique of Stuart Davis," by Jessica Ford
For the last talk of the first PSG session, Jessica Ford (Andrew W. Mellon Fellow in paintings conservation, Brooklyn Museum) presented an in-depth look at the technique and legacy of Stuart Davis (1892-1964). This talk is timely considering the renewed interest in Davis – the retrospective Stuart Davis: In Full Swing is currently on view at the Whitney Museum of Art through September 25. A loan request prompted Jessica’s study of The Mellow Pad (1945-51), and a subsequent grant from the Bank of America Conservation Fund supported not only the pre-exhibition treatment, but also a technical study of the painting and some envy-inducing technology upgrades for the BKM conservation department.
Davis’s art centers on his interaction with color and space, and was heavily influenced by American jazz. He approached his compositions in the same way jazz musicians of the time approached theirs, often riffing on a past theme to arrive at a new result. The Mellow Pad is a riff on a work he began more than a decade before – 1931’s House and Street. In her talk, Jessica illustrated the work’s origin and evolution, even finding old studio photos that showed previous iterations of the work, manipulating and overlaying them to understand how the layers were built up over the long period that Davis worked on this painting.
Jessica took the non-destructive technical study to new heights with the help of the BoA grant, acquiring for the museum a multi-spectral imaging (MSI) setup, reflectance transformation imaging (RTI) equipment, and a fiber optic reflectance spectroscopy (FORS) system. She also collaborated with Nottingham Trent University to bring optical coherence tomography (OCT) to the museum to elucidate questions of layering in the paint without removing a sample. The graphics showing a moving optical cross-section and the feature where you can essentially fall into the paint layer were especially enthralling to this OCT newbie.
The wax-lined painting in its pre-treatment state had significant interlayer cleavage with resulting lifting, due to interlayer chalk from the artist’s technique, zinc-containing pigments, interlayer dirt from the long period of creation, or unstable binding media – or, more likely, some fearsome combination thereof. Jessica performed an admirable feat of BEVA consolidation, captured in this time-lapse video, which I highly recommend you watch because it’s weirdly satisfying to see an immense consolidation job vanquished in 43 seconds. Another condition concern was the discoloration that seemed to only affect paints that were layered in a certain way – a magenta stripe fading only where layered over a certain type of black. This problem is still under study and Jessica included a call-for-commiseration to anyone who might have seen this phenomenon on another Davis painting.
Davis’s work has gone through cycles of interest, and it’s nice to see it’s on the uptick, though there is still significantly less known about his working method than many other American artists of his era. Jessica’s presentation contributed to the aim of increasing our knowledge of Davis’s technique while simultaneously serving as a reminder that there is a lot left to be learned from this artist. I hope this fascinating study spurs more interesting collaborations among the author, the BKM, and other conservators and art historians studying his work.
44th Annual Meeting – Book and Paper Wiki Session, May 15th
The chairs of the Book and Paper Wiki group, Evan Knight, Katherine Kelly, and Denise Stockman, first spoke about the group and its progress on the wiki up to this point. They stressed how valuable the AIC Meeting wiki sessions have been, as they have allowed the wiki coordinators to touch base with their colleagues at least once a year. The group expressed gratitude for our interest and attendance.
The group has focused on making the wiki more useful and accessible to members of the conservation community. Our wiki is only as good as the engagement of its volunteers, and they recognize that one of their chief roles as coordinators was to reduce any barriers to entry for potential contributors. They pointed specifically to the centralization of instructions within the wiki in the form of the new contributors toolbox, which nicely consolidates hints, guidelines and suggestions.
The Book and Paper Wiki Group also aims to move away from the model of the Paper Conservation Catalog (PCC), and towards a wiki model. They expect to change the structure and tone of the wiki to make it a more collaborative document. Knight, Kelly, and Stockman emphasized this idea of an evolving resource in their first major question to the larger community of conservators: how much do we alter the PCC as the profession moves forward and makes it out-of-date? They expressed a great respect for the PCC and its many knowledgeable authors, and knew that it was a key reference for many in our profession.
The audience had a lively discussion about this question. They hoped, as one might expect in our field, that the PCC should be preserved in its original form, as it remains a useful record of past practice in our profession. Others offered the opinion that the Wiki should be a current document, and that it would be frustrating to find an entry for a particular technique, only to discover that approach had fallen out of practice. Several solutions were proposed that might allow the wiki to be up-to-date, while still keeping the old PCC intact. The first was to offer the PCC as a pdf on the wiki for anyone to download. Another suggestion was to include a section in the wiki on techniques that had been superseded by more effective measures, complete with references to papers that signaled the change in approach.
The other major question the coordinators had for the community concerned standardizing the language of bookbinding and conservation. Several sources for controlled vocabulary were suggested, and there was discussion about whether they could be adapted to suit our purposes. Audience members thought that any reasonable source would do, because what the field needed was a lively discussion about vocabulary, and it was agreed that starting from scratch would be counter-productive. Doing something, in short, was better than doing nothing, and the coordinators concurred.
Ultimately, the wiki is making great progress, but needs more contributors. It is moving away from the model of the various conservation catalogues, and towards a more collaborative model of professional information sharing. The wiki offers us the option to begin to standardize our language within our narrow group, but also the possibility to help standardize the way we communicate within our entire profession. Finally, there are a number of things the chairs would like the larger community to send in if possible, including: links for bibliographic references, book and paper conservation tips (for example from AIC tips sessions), and information on materials and tools.
44th Annual Meeting—Gap Filling for Ceramics Workshop
The Gap Filling for Ceramics workshop brought together conservators from various backgrounds to experiment while learning practical tips from Rachael Perkins Arenstein, Conservator at the Bible Lands Museum, and Elisheva Kamaisky, Head Ceramics Conservator at the Israel Antiquities Authority in Jerusalem. The day passed quickly as the workshop was packed with PowerPoint presentations and hands-on activities with spackles, plaster, epoxy techniques suited to archaeological and fine arts contexts. Like many participants I took the class as an opportunity to learn from others and practice without the pressure of working on a museum object. Having focused on ceramics this year, I am familiar with the materials and techniques discussed, but I found it an opportune chance to break out of my familiar habits, review the properties and different reasons for choosing plaster versus bulked Paraloid B-72, for example, or ways of manipulating Milliput and refining plaster.
The program moved through the various stages of the filling process beginning with discussions of how to protect the surrounding surface from ghosting. For porous unglazed surfaces, common in archaeological contexts, Elisheva often uses masking tape or low-tack painter’s tape, pinching around the edges of fills to prevent the infiltration of plaster. Using tape is always evaluated on a case by case basis depending on the stability of the surface and its ability to withstand tape. Elisheva also showed different strategies she uses for backing of plaster fills, such as layering masking tape to conform to the shape of the ceramic, heated wax, and balloons.
The class then discussed tips for mixing and refining plaster, such as how to use a rasp appropriately, when to begin shaving down a fill, and when to stop working it and allow it to dry for wiping down and sanding. Rachael talked about different uses for ready-made spackles and their different properties, pros and cons of using Modostuc, Flugger and PolyFilla. She also referred to different uses of Milliput and gave tips for how to refine it with water before it is dry. This I found particularly useful because refining as much as possible while it is still pliable saves an immense amount of time wasted with sanding or grinding excess material afterwards. I also found the discussion of problems related to B-72 fills helpful as Paraloid is not always easy to work with, and can be difficult to compact. At the end of the day I was very glad to have taken the workshop, and could tell that other participants felt the same as it was a great opportunity to discuss strategies, problems and challenges with conservators with a breadth of experience, and other conservators ranging from those in private practice, to museum conservators who brought expertise with other materials such as wood or stone. It was also a fun way to prepare for the conference, reminiscent of being in graduate school, and getting your hands dirty.
44th Annual Meeting – Objects-Wooden Artifacts Session, Monday 16 May 2016, "Decoys X-rayed: What Volume rad tomography and computed tomography contribute to technical study” by Nancy Ravenel
The Shelburne Museum in Vermont is home to a renowned collection of American wildfowl and fish decoys. During renovation of the Dorset House where the decoys are usually on display, Nancy Ravenel, Objects Conservator, had the opportunity to examine some decoys more in depth. In the process, she explored the pros and cons of two type of three-dimensional x-radiography: computed tomography (CT) and volume rad tomosynthesis (VolumeRAD – a GE Healthcare trademark). Since the museum does not have its own radiography capabilities and is located in rural Vermont, there was no access to industrial imaging resources. Instead, Ravenel explored how best to maximize the capabilities from the local medical community through collaboration with the University of Vermont Medical Center.
For this exploration of radiographic techniques, the decoys proved to be excellent patients since they are somewhat simple in construction, yet personalized between makers and specific when used for hunting versus collecting. As an added bonus, they are easy to transport to the medical center. Ravenel used the Barnes swan as a case study while she looked for a maker’s mark at the head / neck joint.
Samuel Barnes,
Swan Decoy, c. 1890
Collection of Shelburne Museum, 1952-192.4
With the CT scan, Ravenel found that the metal elements cause flares, which can be distracting. Beam hardening on the image was also apparent. Since CT scanning requires specialized equipment, it is harder to schedule causing limited availability. On the other hand, CT data offers 360 degree data with options for viewing in a variety of ways. Examples of CT imaging on two ducks in the Shelburne collection can be viewed here https://youtu.be/FFjRmEat5xE and here https://youtu.be/bH3zEtzKRWs.
In contrast, the VolumeRAD technique captures data with the same equipment as standard radiography offering better accessibility. It also requires less radiation so there is less impact on the image from beam hardening. Cons to the technique include that the data is non-isotropic, the edges are not distinct, and there are fewer options for how the data is viewed. Ravenel also pointed out that it collects data of a short depth, so she has to identify where the imaging should take place, otherwise the results can be fuzzy. This can require some trial and error.
This image was taken at the University of Vermont Medical Center department of diagnostic radiology was part of a volume rad study of the joint between the neck and body of the decoy in order to locate a maker’s mark thought to be within the joint. The technique takes a series of images at set angles, thus avoiding the effect of the fasteners in the joint between the head and neck. The numeral “III” scratched into the joint is easier to see in this technique than it was in a standard posterior-anterior view radiograph.
Samuel Barnes,
Swan Decoy, c. 1890
Collection of Shelburne Museum, 1952-192.4
In the end, Ravenel felt that the VolumeRAD technique shows considerable promise and felt that she was better able to visualize the hollowing bit marks, dowels, and saw marks, which were all more distinct than in the CT scans. VolumeRAD, as a new technique, has considerable room for development and refinement.
An additional note beyond the presentation, there was some follow up discussion on viewing software. Ravenel noted in her presentation that she uses OsiriX, a DICOM viewer, for working with the data once back at the museum. An audience member pointed out that ImageJ is being widely used. Ravenel confirmed that she feels most comfortable with OsiriX and finds it to be more user friendly, while the audience member was quite happy with ImageJ and felt that it had deeper capabilities for the conservation community.
For more images of Shelburne decoys with radiographic images, visit their Flickr page here: https://www.flickr.com/photos/shelburnemuseum/albums/72157650406031226.
44th Annual Meeting – Photographic Materials Session, May 17, "Salvaging Memories: The Recovery of Fire-Damaged Photographs and Lessons Learned in Conservation and Kindness," by Debra Hess Norris
They say a picture is worth a thousand words, but its worth is immeasurable when all other possessions are lost. The efforts of the Winterthur/University of Delaware Program in Art Conservation can be described, therefore, as invaluable. For the past two academic years, Debra Hess Norris and the faculty, staff, and the graduate students of the WUDPAC program have undertaken recovery projects for photographs damaged by fires and floods. In addition to the rigorous course load of the Photographic Materials block at WUDPAC the classes of 2017 and 2018 have added examination, documentation, and treatment of between 240 and 260 photographs, or about 25-35 photographs per student. Their goal was to help people and families who have just survived heartrending disaster.
On Christmas Day in 2014, Ricky and Traci Harris lost their three sons and Ricky’s mother to a devastating house fire. Searching for any way to lessen their grief, friend and WUDPAC PhD candidate, Michael Emmons, sent this image to Ms. Norris via text message:
One of the firefighters had taken the time to collect the fire-damaged photographs and lay them out in the Harris’ garage. Mr. Emmons coordinated with Ms. Norris to have the 260 photographs brought to the Winterthur conservation labs where the first-year graduate students began examining them for treatment. Each individual photograph had a unique variety of damage. By working closely with Mr. Emmons as the Harris family liaison, the students were able to approach treatment with approval and context from the family. The emotional nature of the project was the biggest, but not only, struggle for those involved. Condition concerns ranged from minor planar distortions to an irreversible white haze to the bleeding of inks and dyes. After minimizing the smell of smoke by storing the photographs with zeolite and blotters, students focused on surface cleaning and flattening. The stabilized photographs were then housed in polyester sleeves with zeolite-containing papers to increase the ease of future scanning.
May 24th, 2015 a flash flood hit central Texas with waters reaching 33 feet high in a matter of hours. 30 lives were lost and over 1,000 homes were damaged. As with the Arno floods that formed the theme of AIC’s 2016 Annual Meeting, compassionate volunteers and first responders attempted to salvage photographs and other personal belongings. Local archivists were able to do much in the recovery of the photographs, but 240 of the most severely damaged were sent to Winterthur for their new graduate students. The types of photographs sent ranged from tintypes to digital prints, negatives to photo albums and all suffered severe damage ranging from flaking and delamination to inactive mold. Although there was a wider variation in materials than the fire-damaged photos from the previous year, the primary treatment concerns remained surface cleaning and flattening but also included consolidation, tear mending, and unblocking. Each student was also able to choose one photograph for loss compensation as both an educational exercise and an attempt to make the most severely damaged images more cohesive. In both projects, students progressed from dry to wet cleaning techniques as detailed below and routinely used microscopic examination to assess their progress and analyze different techniques.
Left: Dry Surface Cleaning Techniques, Right: Wet Surface Cleaning Techniques
Different approaches were also needed for fiber-based supports vs. resin-coated supports, again detailed below:
While the educational opportunities of these projects were immense, what I find truly remarkable is the way they inspired and reflected compassion and benevolence both inside and outside the field of conservation. The subject matter clearly resonates with many of us as there was not a dry eye by the end of Ms. Norris’ presentation and the Q&A section was filled with heartwarming remarks and suggestions for how to continue and spread these outreach efforts. Additionally, the public reactions to various press and social media resulted in an inundation of offers for volunteer work, especially for the Harris family. So I would like to end with Ms. Norris’ call to action, “As a profession we must seek ways to share our skills and knowledge broadly, to be a visible presence following unthinkable tragedy, and a known resource for families facing the potential loss of their treasured photographs.”
For details on D4 and its use in photograph conservation, Ms. Norris suggests Shannon Brogdon-Grantham’s abstract entitled “New Approaches to Cleaning Works on Paper and Photographic Materials” from the 2015 Biannual PMG Meeting.
44th Annual Meeting – Objects/Wooden Artifacts Joint Session, May 16th, “A New Understanding of the Aging Characteristics of Asian Lacquer” by Marianne Webb
In this talk, Marianne Webb presented some findings from her ongoing research into the degradation of Asian lacquers.
She produced 11 different samples of lacquer formulated with Urushiol-based lacquer (sourced from Japan, China, and Korea), Laccol-based lacquers (from Vietnam or Taiwan), oil, and pigment. The sample boards were all prepared in the same manner, coated on both sides with raw lacquer, a layer with inert clay filler applied to both sides, and then ground smooth after drying in a wet box. The different lacquer formulations were then applied. The samples were artificially aged in a weather-ometer, exposing a new section of the sample each week for four weeks.
The degradation was evaluated using five factors: color, gloss, surface pH, autofluorescence, and microcracking.
Color – Fading was not a reliable assessment of degradation of black lacquer, but worked well for red lacquers. Microfadometer tests have placed red lacquers between Blue Wool 2 & 3, indicating that lacquer has similar light sensitivity to paper or textiles.
Gloss – Each sample had a different original gloss, with laccol on its own having less gloss than urushi, but becoming very glossy with the addition of oil. Transparent urushi retained its gloss well, but formulations with added oil lost a significant amount of gloss after aging.
Autofluorescence – chemical changes in lacquer seemed immediate once exposed to light (after 12 hours, the differences were obvious) but there is a maximum point at 1 week, then the autofluorescence decreases.
Surface pH – The pH of lacquer doesn’t necessarily drop as it ages. Transparent lacquer seems to have the lowest pH after aging because the light can penetrate it and therefore it gets more light damage. There was not direct correlation between the amount of oil and pH after aging, but they generally had higher pH. After approximately 1 week the pH reaches a plateau and then after 3-4 weeks it goes back up. Clearly, lacquer’s pH does not have a linear relationship to aging. Disclaimer: All pH tests damage the surface of lacquer since they require water to solubilize degradation products, leaving a void.
Microcracking – All of the samples showed changes after exposure to light. The patterns were distinct and all different.
The level of detail in the investigations and results of the study was incredibly impressive. The study emphasized the number of factors that one should consider when approaching each individual piece of lacquer. The author also indicated a desire to investigate formulations with Thitsi lacquer (from Burma and Thailand) and the sudden fogging phenomenon sometimes observed when lacquer is exposed to heat and moisture in the future.
Joint 44th AIC Annual Meeting and 42nd CAC-ACCR Annual Conference — Book and Paper Session, May 16th — “The Coptic Binding Collection at The Morgan Library & Museum: History, Conservation and Access” by Georgia Southworth and Francisco H. Trujillo
Georgia Southworth, Independent Book Conservator, and Frank Trujillo, Associate Book Conservator at The Morgan Library & Museum, closed out Monday morning’s Book and Paper session with a fascinating talk on the history and rehousing of The Morgan’s singular collection of Coptic bindings.
The story of the Coptic bindings at The Morgan Library & Museum began in 1910 with the discovery of a cache of nearly sixty volumes dating from the 9th and 10th centuries CE. Found in Hamouli, Egypt, these volumes made a circuitous journey with stops in France, the United States, and Italy, before coming to rest New York in the 1920s. During the nearly thirty years between their discovery and their arrival at The Morgan, the parchment textblocks were separated from the covers, never to be reuinited. While the textblocks were extensively treated at the Vatican Library, the covers were packed away, presumably with the intention of addressing them at a later time. Unfortunately, World War I and J. Pierpont Morgan’s death interfered with the planned project to photograph and restore the collection, extending the timeline by several years. The covers, which had been consolidated with oil and wax, and in some cases lined with gauze, were not returned to The Morgan until 1929. They remained packed away until 1984, when Deborah Evetts, then the Drue Heinz Book Conservator, found them still stored in their Vatican shipping crates.
The covers are comprised of laminated layers of papyrus covered with leather. The decoration of the leather ranges from simple cold-tooled designs to elaborate compositions incorporating layers of colored and gilt leather and parchment that have been cut, pierced, and interlaced to create complex and beautiful designs.
Image courtesy of The Morgan Library & Museum
The condition of the covers varies widely; while some are almost completely intact, others are brittle, fragmentary, and riddled with wormholes. Attempts to devise a housing method for these exquisite objects had been ongoing since they were re-discovered in 1984. In consultation with Christopher Clarkson, Deborah Evetts performed minor stabilization treatment on a few of the covers, and tested several housing prototypes. The ideal housing would protect and support the covers, while still allowing for easy access and viewing of both sides of each board.
Previous prototypes included deep sinkmats, Plexiglas sandwiches, and simple matboard folders lined with glassine. One prototype was made of layers of Plexiglas cut to fit the perimeter of the cover to create a customized well. Unfortunately, this design was also heavy, and caused the fragile covers to rest against a hard surface.
Image courtesy of The Morgan Library & Museum
Image courtesy of The Morgan Library & Museum
The final housing design incorporated the idea of a custom recess, and used separate layers to allow the sides of each cover to be viewed without direct handling.
The material selected to create the well was soft, inert, non-abrasive Volara foam. Each cover was carefully traced, and the outlines were sent to the University of the Arts in Philadelphia, where they were laser cut into the foam. The layers of foam are sandwiched between two pieces of 1/8” Artcare archival foam board to create a light and rigid support. A full sheet of Volara is adhered to each piece of foamboard, and two inner layers of Volara are laser cut to the shape of each cover. These wells are slightly larger than the covers, providing protection without actually touching the fragile edges.
Image courtesy of The Morgan Library & Museum
Foam pegs keep the layers aligned, but allow them to be separated to expose the sides of the covers. When closed, the layers are held securely in place by these pegs, allowing the sandwich to be flipped to show the verso of the cover. This light, rigid sandwich is stored inside a Talas e-flute reinforced clamshell box. A linen tab was added to the interior of each box to facilitate removal of the sandwich. For easy storage, three standard sizes of clamshell were selected.
Image courtesy of The Morgan Library & Museum
This solution worked well for the covers and large fragments. Smaller fragments were stored separately in Mylar envelopes, which were barcoded to associate them with their parent binding. These envelopes of fragments were stored together in a separate box.
Image courtesy of The Morgan Library & Museum
The final element of this project was the creation of high-resolution images of all the bindings. These images are currently being processed, and will soon be available to the public via The Morgan’s website. In the meantime, I’m sure that many of us will have ideas for applying this novel housing concept to objects in our own collections. Thank you, Georgia and Frank, for an excellent talk!
Joint 44th AIC Annual Meeting and 42nd CAC-ACCR Annual Conference — Book and Paper Session, May 16th — “Push Pins, Staples, Daylight, Glazing and Barrier Free: Are conservation standards becoming too relaxed?” by Joan Weir
In the BPG session on Monday, May 16, Joan Weir gave voice to a question that has undoubtedly plagued the sleep of many of her colleagues: are conservation standards, particularly when it comes to exhibition, becoming too relaxed? In her role as Conservator for Works of Art on Paper at the Art Gallery of Ontario, Ms. Weir has gained extensive experience with the challenges of exhibiting contemporary art. Noting that the range of artifacts classified as “works of art on paper” is very broad, Weir commented that it can be difficult to set consistent boundaries and guidelines for exhibition practices. Some touchstones are available to conservators, including AIC’s Code of Ethics and intellectual property laws. I was interested to learn that in Canada, artists retain “moral rights” to their work, even if they no longer hold economic rights to the work. This moral right allows artists to protect their work from changes that might compromise their original intent, including changes in how the work is displayed.*
To illustrate the challenges inherent in exhibiting contemporary art, Weir presented several case studies. The first example was Richard Serra’s 9’ by 21’ oilstick on paper, Untitled, 1974 (presented at the 2013 AIC Annual Meeting, and blogged by Karen Dabney). The artist’s intention was that the work be stapled directly to the gallery wall, and shown without any barrier. Weir and her colleagues collaborated with Serra and a studio assistant to develop a protocol for installing the work, which toured to several locations. They created mockups to practice the installation protocol, and to try to answer what Weir called “a world of nerdy conservation questions,” such as: what kind of staples should be used? What kind of stapler? Do the staple bands need to come into contact with the paper? Should existing staple holes be used? The same two-person team traveled to all exhibition venues to carry out the installation, and an agreement was reached to station a guard in the gallery at all times, to compensate for the lack of a physical barrier. While the protocol was largely successful, Weir noted that it is often the case that “once you go there, you can’t go back” – stapling is now considered an option for other exhibits.
The next case study was installation of large, unglazed wax pastels for AGO’s 2015 exhibition Stephen Andrews POV, which were hung using a temporary tab of sheer polyester attached to the work using Beva and heat, and stapled to the wall. The artist liked this system so well that he requested that the tabs be left attached to the works he loaned for the show. Low platform barriers were used for this exhibition, but AGO staff noted the presence of footprints on top of the platforms, suggesting that the barrier was not entirely successful.
Throughout her presentation, Weir emphasized the importance of dialog between conservators, curators, and artists. Natural light presents a special set of challenges. Weir cited an exhibit of Marcel Dzama’s work, in which over 100 works were rotated into 33 frames to minimize individual light exposure. She also described a large watercolor on canvas by Silke Otto-Knapp, which was shown unglazed in a gallery with uncovered windows. In that case, the artist shared information about the materials used to create the work, allowing conservators to determine that it was likely to be stable in the gallery conditions.
Through these examples, Weir made a compelling case that our job as conservators is to adapt to changing conventions and exhibition practices, while still ensuring the safety of the artwork. By engaging in early, frequent, and open communication with stakeholders, including the artist, and by thinking creatively about solutions to exhibition challenges, conservators can be good stewards not only of the physical object, but of the artist’s conceptual intent.
*I am not a legal scholar, and I apologize if I mischaracterized the implications of Canadian copyright law!
44th Annual Meeting – Wooden Artifacts Session, May 15, "Embers in the Ashes: Challenges Encountered During the Restoration of Fire-damaged Woodwork in a Historic House Museum by Amanda Salmon and Deborah Hudson”
Craigflower Manor National Historic Site (1853-6) in Victoria, BC is one of the oldest remaining farmhouse buildings in British Columbia and opened to the public in 1969. In January 2009, during an unusually cold winter, a fire started on the first floor. It was probably a “delayed ignition” (also called long term low temperature ignition) fire, caused by an electric heater warming and drying the area over time. There was no fire suppression in the house; fortunately, firefighters arrived in minutes, and extinguished the fire before it reached flashpoint.
Most of the damage was limited to the central staircase, adjacent to the ignition site. There was extensive charring of the structure and millwork, in some places total loss. There were also charred and blistered finishes and soot damage, but relatively little water damage. The restoration of Craigflower took four years, and along with cleaning included replacing wood elements (reusing the hardware as much as possible).
The worst damaged wood (judged as 50% or less of sound wood remaining) was removed. CO2 pellet blasting was used to remove char and soot from other areas, which worked well to quickly expose undamaged wood. Unfortunately, the plastic sheeting intended to contain all the material blasted off the surface was inadequate, and dust was deposited all throughout the house, requiring extensive cleanup in areas with no fire damage. While CO2 blasting companies will often claim that the process does not generate waste or leave behind residues, we should be aware that all the material blasted off during cleaning will go somewhere! Before using CO2 cleaning technique, test to determine how much dust will be generated, and make sure adequate extraction and abatement enclosures are in place before blasting. In the end, traditional mechanical removal of the char using chisels etc. may be more controllable and preferable.