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Proceedings Paper

LIBS identification of pigments from Aula Leopoldina vault
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Paper Abstract

Aula Leopoldina is the most representative, baroque hall in Wroclaw University. In 2008, LIBS measurements of paintings layers of Aula vault were done. LIBS spectra permitted identification of mineral pigments used for specific colors of painting layers. This identification could not be unambiguous in each case since simultaneous occurrence of elements that could be components of different pigments of the same color was observed in some samples. For example, in some red samples the presence of aluminum and iron was stated, and hence red ochre or Mars red could be used as a pigment. In other samples the cinnabar can be additionally responsible for red color. Similar problems were observed in case of blue pigments, where existence of copper may show that azurite was used, but the presence of aluminum, sodium, silicon and iron can point to application of ultramarine, Egyptian or Prussian blues. The greatest difficulties occurred during identification of white pigments. Because of presence of barium, zinc, lead and titanium, the potential pigments might be lithopone, barite, zinc white, lead white or titanium white. Final choice of the pigment is determined by the time of last renovation and this points out that the zinc white was used.

Paper Details

Date Published: 10 July 2009
PDF: 12 pages
Proc. SPIE 7391, O3A: Optics for Arts, Architecture, and Archaeology II, 73910Q (10 July 2009); doi: 10.1117/12.827248
Show Author Affiliations
R. Ostrowski, Military Univ. of Technology (Poland)
W. Skrzeczanowski, Military Univ. of Technology (Poland)
J. Marczak, Military Univ. of Technology (Poland)
A. Sarzynski, Military Univ. of Technology (Poland)


Published in SPIE Proceedings Vol. 7391:
O3A: Optics for Arts, Architecture, and Archaeology II
Luca Pezzati; Renzo Salimbeni, Editor(s)

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