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EFFECT OF THERMAL TREATMENT ON STRUCTURAL DEFECTS OF MODEL PANEL PAINTINGS All the defects that have been suggested by NG as signature defects have been detected both on the untreated and the thermally treated samples. Yet only a few defects attributed to thermal ageing can be related to a specific thermal protocol or a particular type of sample. For example, a signature defect has appeared on sample 2.2 after thermal treatment, but this was not detected on sample 6.1 that has undergone the same thermal procedure. Concerning the sample 5.1, the fringe pattern looks more or less similar before and after treatment. For samples 3.2 and 6.1, the surface texture looks altered after treatment. Concerning the sample 1.2 no conclusions can be extracted as the test conditions were different before and after thermal treatment. (a) (b) (c) Fig. 5. (a) Visible image of the sample Group 5 N o 1; (b) Untreated sample – 1 min 30 sec after front heating; (c) Thermally treated sample – 1 min 30 sec after front heating. (a) (b) (c) Fig. 6. (a) Visible image of the sample Group 6 N o 1; (b) Untreated sample – 1 min after back/front heating; (c) Thermally treated sample – 1 min after back/front heating. 4. Conclusions The thermal treatment of model panel paintings performed at the framework of MultiEncode European Project successfully served the aims of the holographic experiments referring to repeatability. Nevertheless, the several thermal programs that have been investigated by NG may be considered only as preliminary results of the integral study of artificial ageing. Such protocols should be based on a complete series of experiments involving humidity, UV-radiation and their combinations. Additionally, it has to be examined whether the structural diagnosis, the chemical analysis or the measurement of mechanical properties is the optimum method for studying the effects of such 228
WOOD SCIENCE FOR CONSERVATION OF CULTURAL HERITAGE treatment on wood. Complete protocols for imitating old wood for artistic and conservation purposes would be an ulterior expectation of the authors. Acknowledgements The Multi-Encode project (006427) is funded by the European Union and the authors would also like to thank Kostas Hatzigiannakis, Yannis Orphanos and Irini Bernikola at the Institute of Electronic Structure and Laser (IESL), FORTH, Roger Groves and Wolfgang Osten at the Institut für Technische Optik (ITO), Universität Stuttgart, Guy-Michel Hustinx at OPTRION s.a and Stephen Hackney and Tim Green at the Tate-UK, for their collaboration. References 1. www.forth.gr/ae-iesl-accessible/projects/ multiencode. 2. Kouloumpi, E. et al. (2008): “Laser-based structural diagnosis: A museum’s point of view”. Proceedings of the International Conference LACONA VII, Madrid, Spain, 17-21 September 2007. CRC Press, Leiden. 3. Thizy C. et al. (2007): "Role of dynamic holography with photorefractive crystals in a multifunctional sensor for the detection of signature features in movable cultural heritage". Proceedings of the SPIE Conference. Vol 6618 on O3A: Optics for Arts, Architecture, and Archaeology, paper 6618-28, Munich, June 2007 229
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Proceedings e report 67
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Wood science for conservation of cu
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SUMMARY Introduction ..............
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WOOD SCIENCE FOR CONSERVATION OF CU
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INTRODUCTION These proceedings of a
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(A) MATERIAL PROPERTIES
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SORPTION OF MOISTURE AND DIMENSIONA
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VIBRATIONAL PROPERTIES OF TROPICAL
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CREEP PROPERTIES OF HEAT TREATED WO
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MEASUREMENT OF THE ELASTIC PROPERTI
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ELASTIC PROPERTIES OF MINUTE SAMPLE
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4. Results Young's modulus (10^4 Mp
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PREDICTION OF LINEAR DIMENSIONAL CH
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DIMENSIONAL CHANGE OF UNRESTRICTED
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DIMENSIONAL CHANGE OF UNRESTRICTED
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AGEING OF WOOD - DESCRIBED BY THE A
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90 30 0 3,0E-03 - 2,0E 2,0E-03 - 1,
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4. Application HYGRO-LOCK INTEGRATI
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RESEARCH ON THE AGING OF WOOD IN RI
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RESEARCH ON THE AGING OF WOOD IN RI
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Xylarium Database RESEARCH ON THE A
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AGING WOOD FROM CULTURAL PROPERTIES
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AGING WOOD FROM CULTURAL PROPERTIES
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STRENGTH AND MOE OF POPLAR WOOD (PO
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STRENGTH AND MOE OF POPLAR WOOD ACR
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STRENGTH AND MOE OF POPLAR WOOD ACR
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PHOTODEGRADATION AND THERMAL DEGRAD
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ROMANIAN WOODEN CHURCHES WALL PAINT
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DISINFECTION AND CONSOLIDATION BY I
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3. Results and discussion WOOD SCIE
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FUNGAL DECONTAMINATION BY COLD PLAS
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STUDIES ON INSECT DAMAGES OF WOODEN
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TERMITE INFESTATION RISK IN PORTUGU
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BIODETERIORATION OF CULTURAL HERITA
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4. Causes of biodeterioration WOOD
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DEGRADATION OF MELANIN AND BIOCIDES
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MOULD ON ORGANS AND CULTURAL HERITA
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RESEARCH STUDY ON THE EFFECTS OF TH
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4. Methodology WOOD SCIENCE FOR CON
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NON DESTRUCTIVE IMAGING FOR WOOD ID
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METHODS OF NON-DESTRUCTIVE WOOD TES
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MEASUREMENT AND SIMULATION OF DIMEN
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IN THE HEART OF THE LIMBA TREE (TER
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Page 189 and 190: 3. Conclusions WOOD SCIENCE FOR CON
Page 191 and 192: 2. Materials and methods WOOD SCIEN
Page 197 and 198: 3. Chemometrics WOOD SCIENCE FOR CO
Page 201 and 202: 3. Results and discussion WOOD SCIE
Page 203 and 204: NIR SPECTROSCOPIC MONITORING OF WAT
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Page 209 and 210: 3. Methods and models WOOD SCIENCE
Page 213 and 214: SIMPLE ELECTRONIC SPECKLE PATTERN I
Page 217 and 218: 5. Conclusions WOOD SCIENCE FOR CON
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Page 223 and 224: EXPERIMENTAL AND NUMERICAL MECHANIC
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Page 235 and 236: The aims of this work are to: WOOD
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Page 239 and 240: 4. Conclusions chrome yellow WOOD S
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Page 264 and 265: THE WRECK OF VROUW MARIA - CURRENT
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ON 18TH- AND 19TH- CENTURY SACRISTY
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ON 18TH- AND 19TH- CENTURY SACRISTY
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DEFIBRING OF HISTORICAL ROOF BEAM C
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EXAMINATION AND CONSERVATION OF TWO
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EXAMINATION AND CONSERVATION OF TWO
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THE CONSEQUENCES OF WOODEN STRUCTUR
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CONSEQUENCES OF WOODEN STRUCTURES C
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WHAT ONE NEEDS TO KNOW FOR THE ASSE
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load (KN) Samples 6 5 4 3 2 1 WOOD
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STRUCTURAL BEHAVIOUR OF TRADITIONAL
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INVESTIGATION ON THE UTILIZATION OF
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3. Results and discussions WOOD SCI
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Abadlia ......................... 3
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ANNEX 1: FACTS ABOUT COST ACTION IE
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Keynote presentations WOOD SCIENCE
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