Technical Art History a Handbook of Scientific Techniques for the Examination of Works of Art
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Technical Art History A Handbook of Scientific Techniques for the Examination of Works of Art Ingeborg de Jongh, Milko den Leeuw, Jennifer Mass, Daniela Pinna, Lawrence Shindell, Oliver Spapens Technical Art History A Handbook of Scientific Techniques for the Examination of Works of Art Authentication in Art Foundation© 2018 ISBN 978-90-9031032-9 MEMBERS AND CONTRIBUTORS Workgroup Technical Art History Members Eliza O’Donnel – PhD Candidate at Grimwade Centre for Cultural Materials Conservation, University of Melbourne Claire Grech – PhD Candidate at Grimwade Centre for Cultural Materials Conservation, University of Melbourne Drs Ingeborg de Jongh – Founder Atelier for Restoration & Research, Authentication in Art board member Milko den Leeuw – Founder Atelier for Restoration & Research, Founder Authentication in Art Foundation Dr Jennifer Mass – Andrew W. Mellon Professor of Cultural Heritage Science at Bard Graduate Center, President Scientific Analysis of Fine Art Dr Daniela Pinna – Adjunct Professor of Biology Applied to Cultural Herritage School of Sciences University of Bologna Raymonda Rajkowski – PhD Candidate at Grimwade Centre for Cultural Materials Conservation, University of Melbourne Lawrence Shindell – Former Chairman ARIS Title Insurance Prof Dr Robyn Sloggett – Director of the Centre for Cultural Materials Conservation, University of Melbourne Oliver Spapens – Authentication in Art Associate Workgroup Technical Art History Contributors Dr Matthias Alfeld – Laboratoire d’Archéologie Moléculaire et Structurale at Pierre and Marie Curie University Dr Susanna Bracci – Institute for the Conservation and Promotion of Cultural heritage, Italian National Research Council Daniel Fabian – Owner at Fabian Restauratoren Dr Irka Hajdas – Senior Researcher at the Laboratory of Ion Beam Physics, Swiss Federal Institute of Technology Prof Dr Roger Lewis – Senior Professor of Physics at the University of Wollongong Dr David Mannes – Scientist at Paul Scherrer Institute, Switzerland Prof Dr Maria Perla Colombini – Professor of Analytical Chemistry at the University of Pisa Dr Zachary Voras – Department of Chemistry and Biochemistry at the University of Delaware Dr Maurizio Vretenar – Coordinator of Accelerator Research and Innovation for European Science and Society, at CERN Dr Inez van der Werf – Researcher at Università degli Studi di Bari Aldo Moro FOREWORD This publication is a compilation of descriptions of the fifty most commonly used scientific techniques for studying works of art and cultural heritage in general. It is the first time this information has been assembled in one publication in order to make the scientific component more understandable and accessible for people in allied fields, who are often the users of such data. Scientific reports that accompany objects of art are used by, for example, vetting committees at art fairs, art lawyers, art dealers, art collectors, art conservators, art historians, artists estates and auction house staff. Such reports are ideally prepared with an executive summary explaining the results in layman’s terms. However, without a baseline knowledge of the techniques used, the reader cannot discern if the appropriate techniques were used to address the question at hand, if the supporting results match the conclusions made, nor if any further research is required. The scientific reports that accompany objects of art vary in their level of detail and in their utility when addressing the salient questions about a work. For example, the low cost and portability of X-ray Fluorescence has made it widely accessible and therefore commonly used for studying works of art. However, used on its own it cannot address key questions about a work that may require molecular, microscopic, or imaging methods in addition to elemental analysis. With the help of this publication, the non-scientists who use scientific reports on cultural materials in their work will have a guide for assessing these reports, for asking useful questions about the data presented and any logical next steps. In addition, they can use this information when hiring a scientific firm to make sure that the examination protocol proposed will address the key questions about the work in question. There is no overseeing body that provides accreditation to entities offering scientific services for authentication research and condition questions. As a result, not all of the firms, academia, museums or auction house laboratories, who offer such services have the requisite and full background ability or knowledge in all techniques or their intertwined relations. Neither do they always choose the appropriate tools for the research questions at hand. In addition, there are entities that offer certificates of authentication without providing any supporting data or information about their analytical protocols. It is up to the consumer of the data to understand if they have been given a report that will be useful to them, addressing the salient questions about the object. For this reason it is important, prior to commissioning a scientific report, that due diligence about the supplier and the proposed techniques is completed. This Authentication in Art - Technical Art History - publication, which will grow over time as new techniques are introduced to the field or existing ones improved, will empower all in the field of art to work effectively with cultural heritage scientists and provide greater transparency into the scientific component of the art industry. The publication was compiled by leading cultural heritage scientists and stands to become an essential tool for art market stakeholders. Authentication in Art - Technical Art History Workgroup Ingeborg de Jongh, Milko den Leeuw, Jennifer Mass, Daniela Pinna, Lawrence Shindell, Robyn Sloggett and Oliver Spapens CONTENT OF TECHNIQUES 1. Daylight Photography 8 15. Differential Scanning Calorimetry 35 Milko den Leeuw - DSC Zachary Voras 2. Ultraviolet Imaging 9 Milko den Leeuw 16. Neutron Activated Autoradiography 38 Milko den Leeuw 3. Infrared Photography 11 Milko den Leeuw 17. Neutron Radiography 40 Lachlan McInnes 4. Infrared Reflectography 12 Milko den Leeuw 18. Neutron Imaging - NI 41 Eberhard H. Lehmann 5. False Color Infrared 14 Milko den Leeuw 19. Raman Spectroscopy 43 Daniela Pinna 6. Transmitted Infrared 15 Milko den Leeuw 20. Fourier Transform Infrared 45 Spectroscopy - FTIR 7. Ultraviolet-Induced Infrared 17 Daniela Pinna Fluorescence Jennifer Mass 21. Synchrotron Radiation Fourier 49 Transform Infrared Spectroscopy 8. Fibre Optic Reflectance Spectroscopy 19 - SR-FTIR Imaging - FORS Jennifer Mass Daniela Pinna 22. Scanning Electron Microscopy - SEM 52 9. X-Radiography 21 coupled with Energy Dispersive X-ray Milko den Leeuw Spectroscopy - EDS or EDX Daniela Pinna 10. K-edge Imaging 23 Milko den Leeuw 23. Laboratory-Based Micro X-ray 54 Diffraction - XRD 11. Synchrotron X-Ray Fluorescence 25 Jennifer Mass Imaging David Thurrowgood 24. Surface-Enhanced Raman 57 Spectroscopy - SERS 12. Optical Coherence Tomography - OCT 27 Marco Leona Zachary Voras 25. Macro X-ray Fluorescence Imaging 59 13. X-ray Absorption Near Edge 30 - MA-XRF Spectroscopy - XANES Imaging Matthias Alfeld Jennifer Mass 26. Portable X-ray Fluorescence - pXRF - 62 14. Scanning X-ray Powder Diffraction 33 Spot Analysis -XRPD Imaging Jennifer Mass Frederik Vanmeert 27. Confocal X-ray Fluorescence - cXRF 65 40. Direct Temperature Mass Spectrometry 98 Matthias Alfeld - DTMS Zachary Voras 28. Proton Induced X-ray Emission - PIXE 68 Lorenzo Giuntini, Serge Mathot, Francesco 41. Thermogravimetric Mass 100 Taccetti & Maurizio Vretenar Spectrometry - TGMS or TGA-MS Zachary Voras 29. Microsampling 70 Daniela Pinna 42. Laser Ablation Inductively Coupled 102 Plasma Mass Spectrometry 30. Optical Microscopy - OM 72 Augustine Doronila Milko den Leeuw 43. Matrix assisted Laser Desorption 104 31. Atomic Force Microscopy - AFM 74 Ionization Mass Spectrometry Milko den Leeuw - MALDI MS Inez van der Werf 32. Cross Section Microanalysis using 76 UV/VIS Microscopy 44. Electrochemical Analytical Methods 106 Susanna Bracci Lachlan McInnes 33. Cross Section Microanalysis using 78 45. Lead Isotope Analysis 107 Staining Tests Daniel Fabian Susanna Bracci 46. Terahertz Spectroscopy and Imaging 110 34. Immunological Tests 80 Roger Lewis Daniela Pinna 47. Canvas Weave Thread Counting 112 35. X-ray Photoelectron Spectroscopy 83 Milko den Leeuw - XPS Zachary Voras 48. Radiocarbon Dating Method 114 Irka Hajdas 36. Secondary Ion Mass Spectrometry 86 - SIMS 49. Radiocarbon dating using Bomb 116 Zachary Voras Peak C-14 Irka Hajdas 37. Gas Chromatography coupled with 90 Mass Spectrometry - GC-MS or GC/MS 50. Dendrochronology 118 Maria Perla Colombini Milko den Leeuw 38. Pyrolysis Gas Chromatography coupled 93 with Mass Spectrometry - Py-GC/MS Maria Perla Colombini 39. Electrospray Ionization Mass 96 Spectrometry - ESI-MS Zachary Voras AUTHORS’ BIOGRAPHY Dr Matthias Alfeld – studied chemistry at the University of Hamburg (DE) and did a double PhD at the Universities of Antwerp (BE) and Hamburg (DE). In his PhD he developed the first practical XRF scanners for the investigation of entire historical paintings and applied them with his colleagues in the investigation of more than 100 paintings by artists such as Rembrandt, Vincent van Gogh and Caravaggio. After his PhD he worked for two years as a PostDoc at the German Synchrotron DESY in Hamburg (DE), implementing multivariate analysis for spectroscopic imaging data. Since 2015 he is Junior Chair at