Discoloration of pigments induced by laser irradiation

V. Zafiropulos, T. Stratoudaki, A. Manousaki, K. Melesanaki, G. Orial

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

Laser irradiation may alter the colour of certain pigments used in artwork. Owing to the increasing use of lasers in artwork conservation this problem becomes extremely crucial, especially in the case of a polychromy covered by environmental encrustation. X-ray diffraction analysis and optical microscopy were used to study the crystalline structure of selected irradiated pigments in order to identify the changes that take place upon laser irradiation. Two representative pigments were studied, cinnabar (HgS) and lead white (Pb(OH)2.2PbCO3). The results revealed a change in the crystalline phase or chemical composition, respectively, which can be barely detected owing to its superficial character, which is of a nanometre scale.

Original languageEnglish
Pages (from-to)249-253
Number of pages5
JournalSurface Engineering
Volume17
Issue number3
DOIs
Publication statusPublished - 19 Jul 2001
Externally publishedYes

Keywords

  • laser irradiation
  • artwork conservation
  • X-ray diffraction analysis
  • optical microscopy
  • irradiated pigments
  • nanometer scale

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    Zafiropulos, V., Stratoudaki, T., Manousaki, A., Melesanaki, K., & Orial, G. (2001). Discoloration of pigments induced by laser irradiation. Surface Engineering, 17(3), 249-253. https://doi.org/10.1179/026708401101517773