UCLA/Getty Conservation Program

A graduate conservation training program focusing on the conservation of archaeological and ethnographic materials


2012 ANAGPIC Conference

Next week we will be heading to New York City to attend this year’s ANAGPIC conference hosted by the Conservation Center of the Institute of Fine Arts, NYU from April 12-14. Here’s a sneak peak at what our 1st and 3rd years will be presenting:

The ‘dead-bucket’: An inexperienced conservator’s guide for evaluating setbacks
Ayesha Fuentes and Geneva Griswold

Setbacks are an often-unacknowledged reality of conservation practices. This paper examines various types of setbacks, shortcomings, and mistakes in conservation practice, including unsuccessful treatments, errors in judgment, and the limits of intervention. While it may be tempting for a young conservator to anticipate these types of experiences as ‘failures,’ we argue that these situations provide opportunities for growth and development. While a senior professional may readily recognize the value in setbacks and contextualize them by drawing upon their past experiences, we seek to explore the ways in which a less seasoned practitioner may productively reinterpret or reevaluate such situations in terms of our expectations, achievements, and sense of personal responsibility. Categories of setbacks will be illustrated with specific examples from personal experiences and those of our cohort-at-large as pre-program trainees and students.

This project was first inspired by the attempted re-treatment of a ceramic object during the Fall of 2011 at the UCLA/Getty Conservation Training Program. While the objectives of the assigned exercise were unmet — the object was returned to the lending institution in the same condition that it arrived at our training labs— the student learned appreciably about the effects of material degradation, the decision-making process for designating an object as un-treatable, and the ethical considerations such conclusions require. Further examples of setbacks include errors in judgment — such as removing original polychromy by wheeling a tall, wooden sculpture into a low door frame — and a lack of self-awareness with drastic consequences for object safety when a ceramic figure was knocked off a table as a result of fatigue. By reflecting on and discussing the setbacks we encounter as inexperienced conservators, it is possible to glean lessons about our limitations and expectations of conservation practices, and to integrate these into our evolving working methods. Strategies for reevaluating these experiences include viewing them in terms of their positive role in developing long-term goals and practical methodologies as well as promoting a non-punitive and professional culture of honesty, humor, and acceptance. We hope that our attitude will help establish, in the words of Marincola and Maisey (2011), ‘a more fruitful learning culture’ for the benefit of both the field of conservation and its mission to protect and preserve historic and artistic materials.

We hope that by encouraging a collaborative and collective acknowledgement of our limits and, simply put, humanity, will help redefine learning goals for emerging conservation professionals. We believe that fostering an open dialogue amongst our peers, and eventually the conservation community-at-large, will promote a deeper understanding of our methods and the body of wisdom from which we draw as a discipline. Additionally, we would like to promote the idea and organization of an online, perhaps anonymous, forum for practitioners at all stages of their careers to report similar experiences.

Unmasking the surface: A technical analysis of eight polychrome Kuba masks
Geneva Griswold and Madeleine Neiman

The Kuba region, positioned in south-central Democratic Republic of Congo, between the Sankuru, Kasai, and Lulua Rivers, is widely renowned for its vibrant masking tradition. Funerals and initiation ceremonies often include a masquerade, honoring the initiate through dance, masks, clothing, and associated accouterments. While the fields of anthropology and art history have devoted significant time and study to the Kuba masquerade traditions, technical analysis of the methods and materials used in the masks’ fabrication is limited. During the fall of 2011, the first year students at the UCLA/Getty Program in collaboration with their colleagues in the Material Science and Archaeology departments conducted a technical study of a suite of eight Kuba masks in the Fowler Museum’s Wellcome Trust collection. Students employed both non-invasive and invasive techniques including: forensic imaging, X-ray fluorescence spectroscopy (XRF), and ultra-violet-visible-near-infrared (UV-Vis-NIR) spectroscopy, optical microscopy under white, plane, and cross-polarized light (PLM), X-ray diffraction spectroscopy (XRD), scanning electron microscopy (SEM) with energy dispersive X-ray spectroscopy (EDS), and microchemical testing. This paper endeavors to place the information gathered within the larger context of Kuba scholarship, by highlighting the common aspects between the masks as well as their variability. Examination of this collection of Kuba masks contributes to further understanding of the masks’ construction, adaptation, and use, thereby promoting a deeper and fuller understanding of the objects as historic artifacts as well as aid in determining proper methods of handling, storage, display, and conservation.

Treatment of eagle and northern flicker feathers on a Native American shield cover
Tessa de Alarcon

Stabilization of eagle and Northern flicker feathers (Colaptes aurates) was undertaken on a Plains shield cover in the collection of the University of Pennsylvania Museum of Archaeology and Anthropology. Material testing for vane repair and loss compensation was conducted on damaged turkey feathers. Vane repair testing included bridges of hair silk adhered with 5% methyl cellulose as well as linings of light weight Japanese tissue, Hollytex (spunbonded polyester), and silk Crepeline each adhered with 2% methyl cellulose, Lascaux 360, Lascaux 498, or AYAF (polyvinyl acetate resin). Both of the Lascaux adhesives and the AYAF were painted onto the supports and reactivated with heat or solvents. Methyl cellulose performed better than the other adhesives and the hair silk bridges were the least visually intrusive and provided the best support. Loss compensation methods tested included two weights of Japanese tissue (light weight and heavy weight), as well as Hollytex adhered with 2% methyl cellulose. Since methyl cellulose performed better than the other adhesives, it was the only one tested. The lightweight Japanese tissue adhered best in the loss compensation tests. Hair silk and Japanese tissue adhered with methyl cellulose were used on the shield cover feathers with good results.

The Significance of Surface in Central African Masks: Pigment Identification of Polychrome Wood masks from the Congo
Geneva Griswold, Casey Mallinckrodt, Brittany Dolph

The treatment of surfaces in African masking traditions reflects the adaptation of materials for cultural ritual and use. This poster presents a study of surfaces using micro-analytic techniques, whose results provoke questions regarding the masks’ methods of manufacture, material adaptation, and provenance. The colors of different chemical composition and microstructure were sampled from a suite of eight polychrome wood masks from the Kuba region of the Democratic Republic of Congo. Dispersion and cross-section samples of the wood and pigments were analyzed using polarized light microscopy (PLM) and scanning electron microscopy (SEM) in order to ascertain their chemistry and composition. PLM enabled direct observation of optical characteristics relating to particle size, habit, relief, and color under plane polarized light, as well as crossed polarized light observation of birefringence and interference colors, when present. Such characteristics successfully identified the pigments applied on each mask, and facilitated the comparison of manufacturing techniques and materials within the suite. As well, PLM and SEM analyses corroborated evidence attained from XRF, XRD, UV/Vis/NIR, and SEM/EDX investigations. This investigation contributes to our understanding of Kuba mask materials and production, as well as highlights the role of microscopy and microanalysis in the study of African masking traditions.

Tunable Light Sources and Modified Cameras: Utilizing Imaging Techniques to Better Understand Ancient Art at the J. Paul Getty Museum
Dawn Lohnas

Two relatively new imaging techniques, used by both the UCLA/Getty Conservation Program and the Getty Villa antiquities conservation laboratory, have recently been adopted to assist with the non-invasive analysis and documentation of artifacts. The UCLA/Getty Program utilizes a modified camera with an “alternate light source (ALS)” (Mini-CrimeScope®400), which is traditionally used in forensic science. Providing light at narrow band wavelengths using a series of filters, this equipment allows for easy analysis over a broad spectral range. Faintly painted figural outlines on a recently acquired lekythos in the Getty Villa collection were successfully photographed using this technique, and are now included on the object label in the museum’s galleries, illustrating how the vase once looked in antiquity. In addition to the ALS, scientists, conservators and students at the Getty make use of a modified camera system for capturing Visible-induced infrared luminescence of Egyptian blue. It can be used in-situ to confirm the identification of Egyptian blue without sampling, and has helped to identify areas of restoration, and areas of paint decoration that are difficult if not impossible to identify under normal lighting conditions. Several case studies involving these imaging techniques will be discussed.