| ■Tokyo National Research
Institute for Cultural Properties |
■Center for Conservation
Science |
| ■Department of Art Research,
Archives and Information Systems |
■Japan Center for
International Cooperation in Conservation |
| ■Department of Intangible
Cultural Heritage |
|
Presentation on a restoration project in The Museum, Meiji Mura
Presentation by a researcher from the chemistry section of the German Museum of Technology
On February 10th, the Center for Conservation Science and Restoration Techniques hosted a study meeting on “Use of Oil-based Paints in Modern Architecture in Japan” in the Institute’s basement seminar hall. Oil-based paints were used in modern buildings from Meiji to Showa period. In recent attempts to restore these buildings, a frequently encountered problem has been the difficulty of identifying materials in paints. Even if they are identified, the original paints are often hard to obtain, so other materials have to be employed to repaint. Under this situation, specialists from the Agency for Cultural Affairs, museums – from both curatorial and science sections –, and a private company, met to discuss how the modern buildings, i.e. current cultural properties, were painted at that time, how those paints can be identified, why oil-based paints are hard to obtain now, and the steps that can be taken to solve these problems. Presentations were made concerning techniques to identify materials in paint samples and the difficulties in oil-based paints includes the historical background that they became obsolete because of their slow drying property. The speakers were actively engaged by the audience of 45, making the study meeting a meaningful one.
Conference in session
Opening remarks by Takashi ISHIZAKI
In the summer of 2011, electricity users served by Tepco and Tohoku Electric Power were asked to reduce power use (from 9 AM to 8 PM) by 15% from peak levels in 2010. How would museums and art galleries that handle important cultural properties survive? And what problems would they face as a result? The Center for Conservation Science and Restoration Techniques held a conference to review temperature and humidity settings in the exhibition and storage spaces of museums and art galleriess with a supplemental focus on “Reducing Energy Use in Museums and Art Galleries” (the event took place on February 17 (Fri.), 2012 in the Institute’s basement seminar hall and had 66 attendees).
A Survey on Measures Taken to Reduce Museums’ Power Consumption in the Summer of 2011 was conducted from December 2011 to January 2012 with the cooperation of curators who had completed training for museum curators in charge of conservation. Results of the survey were summarized by Chie SANO. In most museums or art galleries, curators seek to avoid changing environmental conditions in storage rooms. At institutions that change the temperature of their galleries, the visitors experience discomfort and their stay in the galleries tends to be short. In some instances, insects and mold infestation and , odors are increased, and metal objects are corroded. In addition, there are concerns about a lack of temperature and humidity control resulting from changes in environment control settings.
Mr. Osamu FUKUNAGA of the National Art Center, Tokyo discusses views on temperature and humidity settings at art museums. Cultural properties vary widely, lending institutions have different views, and local climates, building structures and designs, and curating vary. These facts preclude the establishment of uninform criteria for exhibition conditions, but communication to reach an agreement on those conditions is crucial, as Mr. FUKUNAGA noted. Ms Mitsue NAGAYA reported on controlling conditions following closure of a special exhibition gallery to reduce daytime power consumption in the summer of 2011. Ms NAGAYA presented examples of items that were kept in good condition through nighttime climate control.
Takeshi ISHIZAKI reported on current trends and approaches overseas with regard to temperature and humidity settings to conserve cultural properties. ISHIZAKI cited reports of experiments on the extent of deformation in mock specimens intended to ascertain the effect of changes in humidity on the components of cultural properties. ISHIZAKI also indicated the extent of brief fluctuations in a well-controlled environment and he provided examples of research into an approach that allows some fluctuations in accordance with seasonal changes (temperatures are adjusted but humidity is constant).
Last, Mr. Takashi MATSUO of the Shimizu Institute of Technology described the latest energy-saving technologies used in office buildings. Mr. MATSUO new techniques being tested in relatively large areas to efficiently use energy, such as utilizing shade and reducing peak energy use in conjunction with neighboring areas.
New methods of controlling temperature and humidity by allowing temperature adjustments at a constant humidity or allowing greater fluctuations must be carefully assessed to determine if they truly have no effect on cultural properties, and assessments must be repeated, discussed, and understood by all relevant personnel. The Conference on “Reducing Energy Use in Museums Considering Environments for Conservation of Cultural Properties” provided a valuable opportunity to see the steps in risk management: new information on risk assessment is now available, and risk communication, or how that information is evaluated and shared among stakeholders, is becoming evident.
Mold growing on areas painted oyster shell white
An on-site exposure test with a fungicide
As part of a commissioned study on Development of Techniques to Prevent Color Paint Peeling at Kirishima Shrine and Work to Implement Those Techniques, the Center for Conservation Science and Restoration Techniques has studied biological deterioration of traditionally painted areas of Kirishima Shrine. Traditional painting techniques used organic substances such as animal glue and are usually susceptible to biological deterioration by microbes like mold. If mold grows, it can seriously mar a building’s appearance. Moreover, mold degrades the proteins in animal glue that serve as a binder, causing pigments to separate from the painted surface. Metabolites also cause pigments to discolor and dissolve. As a result, the physical deterioration of painted areas accelerates.
Kirishima Shrine has suffered damage, i.e. extensive growth of mold, in areas that were painted traditionally with oyster shell white paint or ochre paint including walls of breezeways, the covered stone stairway, and the worship hall. This year, a microbiological study was conducted to identify the mold responsible and ascertain the impact of that mold on painted areas. Temperature and humidity changes on-site were also monitored and an exposure test with fungicides was also conducted to help devise optimal control measures.
Environmental measurements revealed that the Shrine’s air temperature is lower than the air temperature of level ground and the Shrine has a relatively high relative humidity of about 70% as an annual average. The Shrine was found to have an environment conducive to the growth of indigenous microbes. During the on-site exposure test with fungicides, several agents were found to have fungicidal action, but some of the fungicides chemically reacted with the white paint and could lead to deterioration. One hundred and thirty-three fungal strains have been isolated from damaged areas. These strains were grouped based on colony morphology and analyzed phylogenetically and physiologically. Results indicated that 3 groups had highly prevalent fungal strains (i.e. they had the most strains isolated). These groups are presumed to play a major role in microbial deterioration of traditionally painted areas of Kirishima Shrine. Plans are to perform a more detailed analysis of the isolated strains and continue exploring measures to prevent and control microbial deterioration of areas with traditional oyster shell white paint and ochre paint in conjunction with exposure test results.
Workshop in progress
The 16th Local Workshop on Materials Conservation was held on Nov. 16th and 17th at the Contemporary Art Museum, Kumamoto The workshop had 68 attendees.
The workshop seeks to send Institute personnel into local communities to teach basic knowledge about materials conservation to curators and administrators of cultural heritage. Seminars are conducted on topics such as general theory, temperature and humidity, lighting, climate control, and pest control. In addition, this session of the workshop was the first to feature a lecture on materials conservation in a “contemporary art museum.” Contemporary art museums are often designed based on concepts unlike those used in facilities dealing with works prior to the modern era. That said, contemporary art museums sometimes handle classical works, including national treasures , so persons in charge of cultural properties need to be aware of the characteristics of their individual facilities in order to safely conserve and exhibit those pieces. Such persons also need to handle those pieces appropriately. In addition, such persons are aware that the time has come for them to seriously consider the conservation of contemporary artworks with potential historical and artistic value. The fact is that we as curators are lacking in experience with and study of both works of contemporary art and the facilities curating them. Thus, the Institute hopes to actively ascertain the needs of current curators and highlight those issues.
Study of the work through X-ray fluorescence analysis in the Suntory Museum of Art
The Department of Art Research, Archives, and Information Systems and the Center for Conservation Science and Restoration Techniques performed optical studies of the Western Kings on Horseback screens (an Important Cultural Property) in the Suntory Museum of Art in 2010–2011. The Western Kings on Horseback screens are known to be masterpieces of early Western-style painting during the Momoyama Period. Together with the Western Kings on Horseback screens in the Kobe City Museum (an Important Cultural Property, currently with 4 panels in each), the screens constitute a pair of four-panel screens depicting 4 rulers on horseback and are said to have originally been wall paintings in Aizuwakamatsu Castle (Tsuruga Castle). However, numerous uncertainties remain regarding events leading to the production of these screens. The optical studies performed took high-resolution color images, infrared images, fluorescent images, and X-ray images of the screens. Depictions and colors were studied in detail and colorants were identified through X-ray fluorescence analysis. Results indicated that the colorants used in both works were primarily pigments used in Japanese-style paintings, but results did reveal that the gold leaf used in the background differed. Some of the study results were noted on a plaque in the exhibit hall of the Suntory Museum of Art during its special exhibition (October 26–December 4, 2011) entitled “Light and Shadows in Namban Art: The Mystery of the Western Kings on Horseback.”
Observation of paint samples
The Technical Standards Section of the Center for Conservation Science and Restoration Techniques held a conference entitled the Study and Repair of Traditional Paints Used in Architectural Cultural Properties in the Institute’s basement seminar hall on September 29th (Thurs.). This conference reprised the theme of Study and Repair of Lacquers Used in Architectural Cultural Properties from the 4th Conference that was held last year. Lacquers are exceptional traditional paints that symbolize Japan and are also restoration materials. The common perception is that paints used in architectural cultural properties that are being restored include only lacquers or pigments+glue. In actuality, however, research has revealed that various other materials, such as drying oils, pine resin, and persimmon tannin, have been used in paint in accordance with the period and conditions. The 5th Conference examined a third type of paint that was neither a lacquer nor a glue. At the conference, I. KITANO began by raising several questions. Dr. Shigeru KUBODERA of the Institute for the History of Architectural Ornamentation Techniques then proceeded to talk primarily about the “Paint known as ‘chian [from Chian turpentine]’ and techniques for its application.” Next, Mr. Noritake SATO of the Nikko Cultural Assets Association for the Preservation of Shrines and Temples lectured on the status of paints other than lacquers used on the temples and shrines of Nikko from the viewpoint of a restorer. Last, Dr. Takayuki Honda of Meiji University explained the science of paint, with a focus on drying oils, and he also reported results of organic analysis of the paints actually used on the temples and shrines of Nikko. The lecturers’ talks were persuasive since they presented issues from the experts’ points of view, and attendees were also given the chance to observe paint samples and boards from the temples and shrines of Nikko brought by Mr. Sato.
The case study in progress
Training Course for Museum Curators in Charge of Conservation was conducted from July 11 to 22 (27 participants), marking the 28th session of that course. Lectures and practics were conducted by instructors from the National Research Institute for Cultural Properties, Tokyo and other facilities to provide curators with knowledge and skill regarding conservation environment at facilities handling cultural properties and prevention of the degradation of different types of materials primarily from a scientific perspective. In addition, Yachiyo Folk History Museum provided a “case study” of a study of conservation conditions on-site. Participants divided into groups to examine set topics and announced their findings. An active discussion took place and questions were asked and answered.
The training session in question featured an agenda that included a lecture on preparations for serious disasters and practica and demonstrations regarding emergency measures to preserve water-damaged photos and paper materials. Unfortunately, none of the attendees were from the Tohoku region, which had been heavily damaged by the recent Tohoku Earthquake and Tsunami, but participants from around the country were reminded of the affected region and the fact that they themselves could be victims of such a disaster. Seeing participants closely follow and observe lectures and practica so that they could prepare for a major disaster as might occur in the future was quite moving.
Lecture underway
On June 27, a follow-up training course was conducted for individuals who had completed training for conservators. The course sought to instruct participants in the latest findings with regard to onservation environment. Under the subheading the Nature of Future Measures to Avoid Biodeterioration, the session included the following 3 lectures:
– Efforts in the event of biodeterioration (Sano Chie, Head, Conservation Science Section )
– Certification, from the Japan Institute of Insect Damage to Cultural Properties, for agents used in conservation (Miura Sadatoshi, Visiting Researcher, Director, Japan Institute of Insect Damage to Cultural Properties)
– The process of combatting biodeterioration via travelling exhibitions (Kigawa Rika, Head, Biological Science Section)
In light of the reality of the vast damage to cultural properties done by the tsunami that accompanied the Tohoku earthquake, Ms. Kigawa gave a lecture on the subject of Initial Efforts to Rescue Cultural Properties. Participants were then given a demonstration of the “Squelch Drying technique,” which was one of the initial efforts used to preserve water-damaged paper materials.
The training session had 88 participants. Attendees represented close to 15% of the individuals who had completed training for conservators over the last 30 years or so. The Center was pleased to see such good attendance, and this turnout impressed upon us at the Center the need to continue improving ourselves by offering even better sessions in the future.
Demonstration of the squelch drying technique
Discussion during the meeting
Spurred by the Project to Rescue Cultural Properties Damaged by the Tohoku Earthquake and Tsunami (Project to Rescue Cultural Properties), the National Research Institute for Cultural Properties, Tokyo will provide logistical support via its Secretariat located in Tokyo and coordinate with the Agency for Cultural Affairs and other relevant institutions and organizations. A specific series of emergency measures must promptly be established (in a manual) to rescue damaged cultural properties in a variety of potential situations. When cultural properties are damaged by water from a tsunami, water damage, salt damage, and biological deterioration due to microorganisms (e.g. mold) should be limited as much as possible. Efforts should also be made to devise responses using materials and infrastructure available on-site in order to facilitate subsequent restoration of those properties. Several types of efforts should be explored. Information should be shared with relevant individuals, institutions, and organizations involved in rescuing those properties and information should be provided to the site of the disaster. As a first step, a conference to share information was held on May 10, 2011 at the National Research Institute for Cultural Properties, Tokyo. The topic of the conference was Expanding Choices in Initial Efforts to Rescue Damaged Cultural Properties: Limiting Biological Deterioration as Much as Possible and Preparing for Later Restoration.
This conference featured issues raised by Isamu Sakamoto, who was actively involved in efforts to rescue damaged cultural properties on-site during the Northern Sumatra earthquake, Toshiharu Enomae, who studied the incidence of mold on paper immersed in seawater, and Hiromi Tanimura, who studied use of the squelch drying technique as a way to rescue damaged cultural properties during recent floods in Europe. Experts in various fields were invited to comment, notes on initial responses for different materials were provided, and views were presented. In addition, the conference featured a demonstration of the squelch drying technique and sample paintings immersed in salt and salt water. Thanks are expressed to the experts who participated and to the 161 attendees who participated in the enthusiastic discussion throughout. Hopes are that this information will prove of some use at rescue sites.
Materials from the conference were made available at the National Research Institute for Cultural Properties, Tokyo website http://www.tobunken.go.jp/~hozon/rescue/rescue20110510.html on May 17.
Front and back cover of Science for Conservation, Vol. 1. The bulletin has faded somewhat after about 47 years, but its format has changed little.
Science for Conservation is a bulletin that reports the results of our study and research regarding conservation of cultural properties primarily from a scientific perspective. The bulletin has been published since it came out in 1964, and Vol. 50 came out at the end of March this year. The bulletin’s history certainly reflects the history of the conservation science in Japan. When Vol. 1 came out, the belief that conservation of cultural properties required scientific perspectives and techniques was little known for the most part. Thus, the term Conservation Science was almost unknown. The term is now widely known thanks to the unceasing efforts and struggles and the passion for conservation of cultural properties on the part of our predecessors. We continue their work, and Science for Conservation will continue to strive to encourage the recognition of this science as a beneficial and essential field of academia.
A limited number of copies of Science for Conservation are printed, so the bulletin is only distributed to relevant institutions. Thus, every article will be available on the Internet in PDF format, starting with Vol. 1. If you are interested, feel free to have a look (http://www.tobunken.go.jp/~hozon/hozon_pdf.html); we welcome your interest in our activities.
A lecture underway
Starting in 2012, Theories of Conservation of Museum Materials will be a required class as part of a university course to train curators. This class requires that students who wish to become curators have knowledge of the conservation of materials with a scientific basis. Although over 300 universities and junior colleges currently offer such a course, the reality is that a limited number of personnel have the expertise sufficient to teach the course. In order to prepare for the start of these classes, lectures on Approaches to Theories of Conservation of Museum Materials took place for 3 days starting on March 8. The lectures were intended for instructors who had been assigned to oversee the course and consisted of 15 lectures related particularly to preventive conservation. The lectures provided information instructors would need to know. The lectures were attended by 81 individuals from around the country, including university instructors and curators overseeing the class on an adjunct basis. Since this was the first time such lectures had taken place, participants praised the lectures but the lasting impression was that many were confused. In the past, involvement with such individuals has been severely limited, but in the future departments that study conservation conditions must play an active role in educating these individuals.
Exhibit depicting a train derailed by sabotage efforts of the Resistance during the War (la Cité du Train (Musée français du chemin de fer), Mulhouse, France)
A sightseeing submersible under restoration (Verkehrshaus der Schweiz, Lucerne, Switzerland)
Precisely aligned automobiles (la Cité de l’automobile (Musée national de l’Automobile), Mulhouse, France)
Road signs as exterior decorations (Verkehrshaus der Schweiz, Lucerne, Switzerland)
From March 8 (Tues.) – 14 (Mon.), the Center for Conservation Science and Restoration Techniques conducted a field survey of conservation and restoration of trains, automobiles, and aircraft in France and Switzerland. The Center also conducted an on-site study of conservation of blast furnaces in Germany. In Mulhouse, France, the la Cité du Train (Musée français du chemin de fer) and la Cité de l’automobile (Musée national de l’Automobile) were surveyed. The number of train cars and automobiles kept by both museums was both considerable and impressive. Train cars were arranged with ample space for exhibits and there was no sense of being closed in, as is often found in railroad museums. Train cars were kept indoors and properly stored. Cars were diligently repainted since this is an aspect visitors would notice, though this aspect did have some drawbacks. Nevertheless, there were various twists in the way exhibits were laid out and the museum is interesting enough to warrant repeat visits. The automobile museum was extremely neat and felt like a museum for car buffs, which is probably the result of the collection being based on automobiles that were originally privately owned. Although the cars were obviously well preserved, many of the cars were resting directly on their tires and marks on those tires were evident.
The Verkehrshaus der Schweiz, located beside Lake Lucerne in Switzerland, was surveyed. The museum grounds are over 2000 square meters and feature a space where children can play in the center with exhibit halls surrounding it. The impressive museum showcases items related to transportation. Although there was an undeniable sense that the collection was somewhat mix-and-match overall, seeing so many things in one place was a joy. Most of the exhibits were made of iron and the museum had apparently taken pains to rust-proof portions touched by visitors. The last site surveyed was an ironworks in Germany. Although its style is found throughout Europe, the facility was extremely interesting in the sense that it appeared to have mostly ceased operations and remained in that state. One hand is used on facilities for visitor safety (handrails, the elevator, and walkways) although the hands are not used elsewhere, a fact that makes the site extremely interesting. Having such a site in Japan would obviously be rather difficult because of the numerous legal constraints and need for evacuation routes in the event of a fire.
Exposed test pieces under an open platform (stage)
The Center for Conservation Science and Restoration Techniques studied materials to restore the Otorii gate of Itsukushima Shrine. The study selected materials for use in a coastal setting with harsh conditions such as high temperature and high humidity, immersion in water, and the presence of salts. Forced degradation tests are currently being performed in the lab and an exposure test is being performed on-site. Exposure on-site began in June 2010, and the water content in test pieces is being measured and deterioration is also being observed, in every 2 months. These tests will continue in the future, and plans are to verify deterioration via a strength test in 2011. Forced degradation tests in the lab include a UV irradiation test and temperature cycle test, and plans are to conduct a salt spray test in 2011.
Lecture by Professor John Grunewald, Dresden University of Technology
A conference on Analysis of Conditions at Facilities Handling Cultural Properties and Reduced Energy Use by Museums was held on February 25, 2011 in the seminar hall of the National Research Institute for Cultural Properties, Tokyo. The current problem of global warming requires efforts to reduce the emissions of greenhouse gases at every facility. Facilities like museums and art museums are no exception. Facilities like museums and art museums need to have reduced energy use while adequately maintaining conditions so that cultural properties can be safely passed on to later generations. At the conference, Professor John Grunewald of Dresden University of Technology, who oversees environmental analysis of projects to reduce energy use by buildings in Germany, gave a lecture on Techniques for Reduced Energy Use by and Analysis of Conditions in Buildings in Germany. Dr. Rudolf Plagge of Dresden University of Technology also gave a lecture on Methods of Measuring the Physical Properties of Building Materials in relation to Environmental Analysis. Dr. Plagge’s lecture cited the problem of deterioration of marble statuary along Berlin’s Unter den Linden Boulevard. In addition, Motoe Kanno, Akihiro Yagawa, and Akihiko Ohta of the Shimizu Corporation gave a lecture entitled Techniques for Airflow Simulation to Analyze Conditions at Facilities Handling Cultural Properties and Examples of Their Use. They described techniques for environmental analysis and they cited sample analyses performed during renovation of the Nezu Museum’s repository. There were 50 attendees in total, and an active exchange of opinions took place.
Lecture at the workshop
The purpose of the workshop shown in the above title is to give lectures to persons in charge of conserving cultural properties in local districts so that they learn fundamental knowledge of conservation on December 13, we held this 15th workshop at the Kochi Prefectural Museum of History, hosted by the Kochi Education Board and Tobunken. Although we usually cover each item of temperature/humidity and atmospheric environment in detail, we gave lectures focusing on measures against biotic damage on this occasion. The major reason for these lectures is that the problems of bugs and mold and countermeasures against them are serious concerns for the persons in charge of the conservation of cultural properties in Kochi. The following four persons conducted lectures using their areas of expertise and viewpoints: Mr. Asaga Hiroshi, the Cultural Property Conservation Instructor at the Arts and Culture Section of the Agency for Cultural Affairs; Mr. Okamoto Keisuke, the Art and Culture Section Manager of the Kochi Prefectural Museum of History; Mr. Miura Sadatoshi, the Director of the Japan Institute of Insect Damage to Cultural Properties (a honorary researcher of our Institute); and Ms. Sano Chie, the Head of the Conservation Science Section at the Tobunken Center for Conservation Science and Restoration Techniques.
A great many people participated in the workshop from the expanse Kochi prefectural area. Wee felt their high level of interest through the eagerness of their questions and discussions. We are holding this workshop session at the request of the local residents. Please do not hesitate to ask us if you have any requests.
Inside the stone chamber with all plaster walls removed
The Center for Conservation Science and Restoration Techniques has been removing the wall paintings of Kitora Tumulus as part of a project called the Investigation on Conservation for special historic site Kitora Tumulus, commissioned by the Agency for Cultural Affairs. We had aimed to complete the removal in the next spring term following the intensive removal of the paintings in the spring and autumn of 2009. However, we removed all plaster from the stone chamber walls during this term earlier than the planned schedule (autumn 2010). This work was attributed to the proficiency of the engineers in removal, as well as to the development and improvement of the machines, tools and materials promoted by Tobunken. The work in the stone chamber was finished in a series of conservation projects of Kitora Tumulus Wall Paintings, starting with the removal of Seiryu (blue dragon) in 2004. We will begin treating and mounting the wall paintings in the conservation facility.
Usuki Stone Buddha Statues. This is a national treasure and a designated historic site (seated Amitabha Tathagata Buddha statue of the second group of Hoki stone buddhas)
Since 2000, the National Research Institute for Cultural Properties, Tokyo has been promoting a joint research study with Usuki City to establish the conservation plan of the Usuki Stone Buddha Statues, a national treasure and a designated historic site for the next term. On November 6th, we held report presentations on the results of research for these 10 years in the Debriefing Session on the Conservation Environment of Usuki Stone Buddha Statues at the central community hall of Usuki City.
Mr. Takeo Oku at the Agency for Cultural Affairs first made a speech on the significance of the conservation plan for the next term, followed by Mr. Shoichi Shimoyama at Kyushu University presenting a lecture on the Aso ignimbrite, on which the Usuki Stone Buddha Statues were sculpted. Then Mr. Lee Chan-hee at the Kongju National University and Mr. Kim Sa-dug at the National Research Institute for Cultural Properties in South Korea gave lectures about the survey on the deterioration states of stone cultural properties in South Korea and the conservation of them. Following these lectures, the researcher of our Institute made a report on the results of research, including the outline of research, the deterioration state of the surface of rock-carved Buddha statues, and the water and air environments. By reviewing the results of the survey on the causes of deterioration, the researcher also made some proposals about measures against deterioration, such as antifreeze measures during cold periods and measures for inquiline control, as well as deterioration monitoring techniques. Closing the session, the Usuki City Education Board presented draft plans about a conservation project for the next term and subsequent monitoring and maintenance, with a title called the Vision of Long-Span Conservation Plan for Usuki Stone Buddha Statues. They asked the participants for their understanding.
Although our research continued for an unprecedented 10 years for one cultural property, we have gained a lot of results here. We hope that these results will be utilized to conserve not only the Usuki Stone Buddha Statues, but many other stone cultural properties as well.
Inside the paper restoration studio at Deutsches Technikmuseum Berlin
From October 5th (Tuesday) to 13th (Wednesday), researchers of the Center for Conservation Science and Restoration Techniques conducted a workshop related to the restoration of paper cultural properties at the lecture room of National Berlin Asia Museum in Berlin as part of the Cooperative Program for the Conservation of Japanese Art Objects Overseas. The workshop held this year consisted of three courses – the basic course (20 people), the beginners’ course (12 people) and the intermediate course (7 people) – on hanging scrolls, targeting conservators at museums and art museums, and restorers of paper. In the basic course, a lecture was given on paper, adhesive and restoration, and conservation. In the beginners’ course, the structure and handling of hanging scrolls was explained using a model and practical training on the coloring of silk was conducted. In the intermediate course, practical training on removal and attachment of top and bottom axes and string attachment was conducted. The workshop was received well by the participants as a fulfilling workshop.
Lecture at the workshop
On October 19 (Tuesday), 2010, the National Research Institute for Cultural Properties, Tokyo hosted a workshop titled as in the above, with the co-host being the Kyushu National Museum. This workshop was intended for the persons in charge of conservation at the museums, art museums, etc. and the persons in charge of protection of cultural properties in local governmental organizations in the Kyushu, Chugoku and Shikoku districts. During this workshop, the colors of five Japanese paintings which changed due to the tent fumigation in the warehouse by use of a drug with the active ingredient of aluminum phosphide, which is not allowed to be used for the fumigation of cultural properties, was discussed. In response to this accident, we considered the urgent need to promote understanding of the fumigation of cultural properties, and held the workshop in cooperation with researchers whom are collaborative members of the Center for Conservation Science and Restoration Techniques. The following presentations were made: “Management of borrowed art objects for exhibitions” by Mr. Asaka Hiroshi, the Cultural Property Conservation Instructor at the Arts and Culture Section of the Agency for Cultural Affairs; “Details on the chemicals designated by the Japan Institute of Insect Damage to Cultural Properties” by Mr. Miura Sadatoshi, the Director of the Japan Institute of Insect Damage to Cultural Properties; “Characteristics of gas fumigant and impacts on cultural properties” by Ms. Sano Chie, the Head of the Conservation Science Section in the Center for Conservation Science and Restoration Techniques at the National Research Institute for Cultural Properties, Tokyo; and “Fumigation performed in museums – as part of IPM (Integrated Pest Management)” by Ms. Honda Mitsuko, the manager of the museum science section of the arts and culture department at the Kyushu National Museum. We reconfirmed that safety comes first for cultural properties, and appealed to the participants to take part in training, etc., collect information and improve techniques in order to facilitate the safe execution of gas fumigation used as an insecticide and fungicide (at the Kyushu National Museum, with 126 participants).
Practical session
The International Course on Restoration of Japanese Paper was held from August 30 to September 17. Among approximately 80 applicants engaged in the conservation of cultural properties around the world, ten participants from Ireland, Australia, Malaysia, etc. were selected. Various topics covered in the lectures included material studies, bibliographies and so on. In the practical sessions the participants made infillings of missing parts, lining, attached axial rods, and produced a work into a hanging scroll. They also challenged Japanese-style book binding. In the study tour, the participants visited Mino city, a place famous for handmade paper also used for restoration as well. They also visited the restoration studios, such as the traditional mounting studio and the cultural property conservation studio of the Kyoto National Museum. The handed down techniques and knowledge lead to the promotion of conservation and use of Japanese paper cultural properties, and furthermore, it is expected that they will be applied to the repairing and conservation of Japanese art objects overseas.
