Analysis of smalt discoloration in paintings by X-ray absorption spectroscopy
Research and innovation REF: RE211 V1

Analysis of smalt discoloration in paintings by X-ray absorption spectroscopy

Authors : Laurianne ROBINET, Nicolas TRCERA, Sandrine PAGÈS-CAMAGNA, Marika SPRING, Solenn REGUER

Publication date: October 10, 2012 | Lire en français

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Overview

ABSTRACT

The chemical modifications linked to smalt discoloration in historic paintings have been analyzed by the X-ray absorption spectroscopy using synchrotron radiation. The micronic size of the X-ray beam and the wide range of energy provided by the LUCIA beam lines and DiffAds of the SOLEIL synchrotron have been determining in order to prove individually the smalt grains in microsamples from paintings from the National Gallery (London) and the musée du Louvre (Paris) collections. The XANES and EXAFS spectra registered at the threshold K of the coloring cobalt ion have proved that this change in color was associated with the coordination change in the cation.

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AUTHORS

  • Laurianne ROBINET: Research engineer on the IPANEMA platform at the SOLEIL synchrotron - (currently a research engineer for the French Ministry of Culture at the Centre de Recherche sur la Conservation des Collections (CRCC), USR 3224 CNRS, Museum national d'histoire naturelle)

  • Nicolas TRCERA: Scientist on the LUCIA line at the SOLEIL synchrotron

  • Sandrine PAGÈS-CAMAGNA: Research engineer for the French Ministry of Culture at the Centre de Recherche et de Restauration des Musées de France (C2RMF)

  • Marika SPRING: Scientist at the National Gallery in London

  • Solenn REGUER: Scientist on the DiffAbs line at the SOLEIL synchrotron

 INTRODUCTION

Key points

Field: Synchrotron analysis technology

Degree of technology diffusion: Emergence | Growth | Maturity

Technologies involved: X-ray absorption spectroscopy

Applications: Chemical analysis of heritage works

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Contact: http://www.synchrotron-soleil.fr/ipanema

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Analysis of color loss in smalt paints by X-ray absorption spectroscopy

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