Porcelain Analysis and Its Role in the Forensic Attribution of Ceramic Specimens

The material for this book arose from the author's research into porcelains over many years, as a collector in appreciation of their artistic beauty , as an analytical chemist in the scientific interrogation of their body paste, enamel pigments and glaze compositions, and as a ceramic historian in the assessment of their manufactory foundations and their correlation with available documentation relating to their recipes and formulations. A discussion of the role of analysis in the framework of a holistic assessment of artworks and specifically the composition of porcelain, namely hard paste, soft paste, phosphatic, bone china and magnesian, is followed by its growth from its beginnings in China to its importation into Europe in the 16 th Century. A survey of European porcelain manufactories in the 17 th and 18 th Centuries is followed by a description of the raw materials, minerals and recipes for porcelain manufacture and details of thechemistry of the high temperature firing processes involved therein. The historical backgrounds to several important European factories are considered, highlighting the imperfections in the written record that have been perpetuated through the ages. The analytical chemical information derived from the interrogation of specimens, from fragments, shards or perfect finished items, is reviewed and operational protocols established for the identification of a factory output from the data presented. Several case studies are examined in detail across several porcelain manufactories to indicate the role adopted by modern analytical science, with information provided at the quantitative elemental oxide and qualitative molecular spectroscopic levels, where applicable. The attribution of a specimen to a particular factory is either supported thereby or in some cases a potential reassessment of an earlier attribution is indicated. Overall, the information provided by analytical chemical data is seen to be extremely useful for porcelain identification and for its potential attribution in the context of a holistic forensic evaluation of hitherto unknown porcelain exemplars of questionable factory origins.

Describes the role of analytical science in the holistic forensic attribution of unknown porcelain specimens Includes protocols for the establishment of the definition of the classification of a porcelain body.

Auteur

Professor H.G.M. Edwards M.A., B.Sc., D.Phil., C.Chem., F.R.S.C. Emeritus Professor of Molecular Spectroscopy, Director of the Centre for Astrobiology and Extremophiles Research , Faculty of Life Sciences , University of Bradford, Bradford BD7 1DP, UK. Honorary Scientific Adviser to The De Brecy Trust for the scientific evaluation and pigment composition of Renaissance and later period paintings.Howell Edwards studied Chemistry at Jesus College, University of Oxford. Following a Research Fellowship at Jesus College at the University of Cambridge, he took a lectureship in Structural and Inorganic Chemistry at the University of Bradford where he subsequently became Professor of Molecular Spectroscopy and Head of the Chemical and Forensic Sciences Division. In 2003, he received the Sir Harold Thompson Award from Elsevier Science for his international contributions to vibrational spectroscopy. He is the recipient of the Emanuel Boricky Medal for 2008/2009 from Charles University, Prague, for distinguished international contributions to geochemistry and mineralogical analysis. He was awarded the Charles Mann Award from the US Federation of Analytical Chemical Spectroscopic Societies in 2011 for his distinguished international work on the applications of Raman spectroscopy.

Professor Edwards has wide-ranging interests in the applications of Raman spectroscopy to the characterisation of materials particularly in forensic, art historical, astrobiological and archaeological contexts. He is a guest editor and contributing author of the Philosophical Transactions of the Royal Society, the oldest scientific journal in the world. He has been a forerunner in the Raman spectroscopic identification of chemicals produced in biodegradation processes for prehistoric and contemporary systems in an archaeological context - he first investigated the Raman spectra of Dirina lichen colonization of toxic metal substrates on Italian Renaissance wall-paintings in 1991 and has extensively studied the pigments and associated materials involved in paintings from prehistoric cave art to the 20th Century. He is science lead on the European Space agency/Roscosmos ExoMars Raman Laser spectrometer instrument in the Pasteur suite of a planetary rover which will interrogate the Martina surface and subsurface to search for biosignatures and signs of extant and extinct life, scheduled to launch in 2020, with particular responsibility for the interpretation of Raman spectroscopic biosignatures from biogeological niche environments on Mars. He is also UK representative on the ESA/Roscosmos Landing Site Selection Group dedicated to determine where the spacecraft will land on Mars for the deployment of the rover vehicle.

Texte du rabat

The material for this book arose from the author s research into porcelains over many years, as a collector in appreciation of their artistic beauty , as an analytical chemist in the scientific interrogation of their body paste, enamel pigments and glaze compositions, and as a ceramic historian in the assessment of their manufactory foundations and their correlation with available documentation relating to their recipes and formulations. A discussion of the role of analysis in the framework of a holistic assessment of artworks and specifically the composition of porcelain, namely hard paste, soft paste, phosphatic, bone china and magnesian, is followed by its growth from its beginnings in China to its importation into Europe in the 16th Century. A survey of European porcelain manufactories in the 17th and 18th Centuries is followed by a description of the raw materials, minerals and recipes for porcelain manufacture and details of thechemistry of the high temperature firing processes involved therein. The historical backgrounds to several important European factories are considered, highlighting the imperfections in the written record that have been perpetuated through the ages. The analytical chemical information derived from the interrogation of specimens, from fragments, shards or perfect finished items, is reviewed and operational protocols established for the identification of a factory output from the data presented. Several case studies are examined in detail across several porcelain manufactories to indicate the role adopted by modern analytical science, with information provided at the quantitative elemental oxide and qualitative molecular spectroscopic levels, where applicable. The attribution of a specimen to a particular factory is either supported thereby or in some cases a potential reassessment of an earlier attribution is indicated. Overall, the information provided by analytical chemical data is seen to be extremely useful for porcelain identification and for its potential attribution in the context of a holistic forensic evaluation of hitherto unknown porcelain exemplars of questionable factory origins.

Contenu
Chapter 1: Introduction - Setting the Scene: Analytical Data and Connoisseurship for Attribution in Art.- Chapter 2 . Chinese Porcelains and Their Early European Competitors.- Chapter 3. Establishing the Historical Baseline Chronology for European Porcelains.- Chapter 4. Types of Porcelain and Their Elemental Oxide Compositions.- Chapter 5 . Analytical Science and Case Studies.- Chapter 6 . Case Studies I : Analytical Data Which Have Materially Contributed to the Attribution of Porcelain Specimens.- Chapter 7 .Case Studies II : Analytical Data Which Have Revealed That Significant Revision is Required to Historical Knowledge of Porcelain Manufact…