Showing posts with label spectroscopy. Show all posts
Showing posts with label spectroscopy. Show all posts

31 May 2010

Article: Analysis of South-Asian Shaman paintings (2008)


Title
: Analysis of South-Asian Shaman paintings at the national museum of Denmark

Author
: P. Vandenabeele, M. C. Christensen, L. Moens

Reference
: Journal of Raman Spectroscopy, Volume 39 Issue 8, 2008, Pages 1030-1034

Link
: http://hdl.handle.net/... (pdf, 193 Kb)


Abstract
:
Raman spectroscopy is often used for the non-destructive analysis of archaeological objects or artefacts. Recently, the use of mobile Raman instrumentation has become increasingly popular for in situ investigations. Moreover, in this work, direct Raman analysis was completed with Fourier-transform infrared (FT-IR) analysis and scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM-EDX). We used a dedicated mobile Raman instrument to perform direct analysis on a series of Shaman paintings on textile, which are part of the collection of the National Museum of Denmark. In general, relatively little attention has been given to the investigation of 19th or 20th Century artworks of Southeast Asian origin. The paintings under investigation depict Shaman gods and were previously dated between 1870 and 1950. The aim of this work was to obtain information on the materials that were applied and to narrow these dates, based on the artists' materials that could be identified. By using the combination of analytical techniques (Raman analysis with FT-IR and SEM-EDX), it was possible to obtain information on inorganic and organic pigments, the binding medium and the canvas.


Article: Micro-Raman spectroscopy of pottery (2010)


Title: Micro-Raman spectroscopy of decorated pottery from the Iberian archaeological site of Puente Tables (Jaén, Spain, 7th - 4th century B.C.)
Authors: D. Parras, P. Vandenabeele, A. Sánchez, M. Montejo, L. Moens and N. Ramos
Reference: Journal of Raman Spectroscopy 41, 2010, 68-73
DOI: 10.1002/jrs.2405
Link: http://hdl.handle.net/... (pdf, Mb)

Abstract:
In this paper, Raman spectroscopy is used for the first time to identify the pigments on decorated antique Iberian pottery. Ceramic fragments of type Real and others from the archaeological excavation in the oppidum Puente Tablas were examined. Different types of iron oxide pigments (hematite and goethite) were identified, along with amorphous carbon. in some samples, the presence of chalk or gypsum could be demonstrated. Some unattributed Raman bands are believed to be associated either with post-burial organic deposition or with silicate materials that are present in red ochre. It was possible to relate the findings with geological data from the region and to make assumptions on a local production.


02 April 2010

Article: Reflectance spectroscopy of natural dyes (2009)


Title: Reflectance spectroscopy of natural dyes
Authors: S. Acquaviva, E. D’Anna, M. L. De Giorgi, A. Della Patria, M. Fantuzzi, S. Omarini, R. Piccolo
Reference: DGaO Proceedings 2009
ISSN: 1614-8436
Download: http://www.dgao-proceedings.de/... (pdf, 67 Kb)

Abstract:
Physical and chemical properties of Madder, Weld, Turmeric and Woad, produced at the Museo dei Colori Naturali (Lamoli, Italy), have been investigated. The chromatic properties of powders and tempera models have been studied through the reflectance spectroscopy technique. Micro-Raman and SEM/EDX analyses have complemented the survey.


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Article: characterization of pigments by reflectance spectroscopy (2008)


Title: Optical characterization of pigments by reflectance spectroscopy in support of UV laser cleaning treatments

Authors: S. Acquaviva, E. D’Anna, M. L. De Giorgi, A. Della Patria, L. Pezzati
Reference: Applied Physics A, Volume 92, Number 1, July 2008, pp. 223-227
DOI: 10.1007/s00339-008-4486-2
Download: http://www.ino.it/... (pdf, 344 Kb)

Abstract:
The study of optical properties of artwork materials is of fundamental importance for laser-based restoration techniques. In this work, reflectance spectroscopic measurements and colorimetric analyses of painted wooden models were performed to discriminate between pigments on the basis of their spectral features. In particular, the spectral reflection factors of different white pigments were recorded with a fibre optics reflectance spectroscopy module, both before and after excimer laser (248 nm) irradiation. Colour data were obtained and monitored with an integrating sphere spectrophotometer and expressed with the CIE L*a*b* colour coordinates. Moreover, the laser-induced morphological changes of the samples were investigated by scanning electron microscopy.


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30 September 2009

Infrared Spectroscopy in Conservation Science (1999)



Authors: Michele R. Derrick, Dusan Stulik, and James M. Landry
Title: Infrared Spectroscopy in Conservation Science
Publisher: The Getty Conservation Institute
Year: 1999
Links:
http://www.getty.edu/... [PDF, 6.09 Mb]

Table of contents (short version):

Chapter 1. History of Infrared Spectroscopy
Chapter 2. Infrared Absorption Theory
Chapter 3. Sample Collection and Preparation
Chapter 4. Infrared Analysis Methods
Chapter 5. Spectral Interpretation
Chapter 6. Case Studies
Appendix I. Selected Infrared Spectra Collections and Digitized Libraries
Appendix II. Infrared Reference Spectra
Glossary
Suppliers
References
Index