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EFFECT OF THERMAL TREATMENT ON STRUCTURAL DEFECTS OF MODEL PANEL PAINTINGS the authors of the NG have not come across any published scientific work focused on artificially aged wooden samples that imitate old artistic substrates. (a) (b) Fig. 1. (a) An artificially-made sample (Sample 1-Group 1); (b) Schematic cross-section of the sample. The protocol followed at the first stage of thermal treatment of the model panel paintings is presented in table 1. The procedure was performed in a thermal chamber (Memmert Company). The samples were examined by the technical partners by means of Digital Speckle Holographic Interferometry (IESL), Shearography (ITO) and Dynamic Holographic Interferometry (CSL). At a second stage, some of the samples were further treated whereas others were restored and then treated again. The preliminary results that are presented in this paper have been aroused from the samples’ examination performed by the co-authors of CSL, by means of DyHI [3]. Two standard setups have been used, i.e. 2 front illuminations or 1 back and 1 front illumination with 175IR lamps. Table 1: The protocol followed at the first stage of the thermal treatment of the samples Group Sample Thermal protocol 1 All Continuous heating at 102 o C for 480 hrs 2 All Heating at intervals at 102 o C for totally 66,5 hrs 1 (IESL) Continuous heating at 102 o 3 C for 17,5 hrs 2 (CSL) Continuous heating at 102 o C for 46hrs 3 (ITO) Continuous heating at 102 o C for 141 hrs 4 All Continuous heating at 85 o C for 247 hrs 5 All 1. Continuous heating at 60 o C for 66,5 hrs 2. Continuous heating at 90 o C for 148 hrs 6 All Same as GROUP 2 3. Results Some representative results of the numerous experiments that have been performed by CSL are presented in Fig. 2 – Fig. 6. The presented inteferograms have been processed so that sheared images and diagrams are acquired. Nevertheless, only some examples that may substantiate the effect of 226
WOOD SCIENCE FOR CONSERVATION OF CULTURAL HERITAGE thermal treatment are presented in the current paper. The red marked areas on the interferograms (b) show defects caused deliberately to the samples during the construction. The red marked areas at the interferograms (c) are indicating the defects detected after the thermal treatment. (a) (b) (c) Fig. 2. (a) Visible image of the sample Group 1 N o 2; (b) Untreated sample – 9 min 25 s after back/front heating; (c) Thermally treated sample – 1 min 30 s after back/front heating. (a) (b) (c) Fig. 3. (a) Visible image of the sample Group 2 N o 2; (b) Untreated sample – 2 min after front heating; (c) Thermally treated sample – 2 min after front heating. (a) (b) (c) Fig. 4. (a) Visible image of the sample Group 3 N o 2; (b) Untreated sample – 3 min after front heating; (c) Thermally treated sample – 3 min after front heating 227
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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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Page 179 and 180: 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
Page 207 and 208: NUMERICAL SIMULATION OF THE STRENGT
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
Page 221 and 222: Average r adiated presure field (dB
Page 223 and 224: EXPERIMENTAL AND NUMERICAL MECHANIC
Page 229: EFFECT OF THERMAL TREATMENT ON STRU
Page 235 and 236: The aims of this work are to: WOOD
Page 237 and 238: ultramarine [bad] titanium white [m
Page 239 and 240: 4. Conclusions chrome yellow WOOD S
Page 249 and 250: Fig. 7 - A soaked lamella clamped i
Page 253: (D) CONSERVATION
Page 256 and 257: EUROPEAN TECHNICAL COMMITTEE 346 -
Page 264 and 265: THE WRECK OF VROUW MARIA - CURRENT
Page 270 and 271: ROMANIAN ARCHITECTURAL WOODEN CULTU
Page 276 and 277: RESSURREIÇÃO DE CRISTO - PANEL FR
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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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