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Study of late 18-19th century paintings of "Vienese school" by non-invasive analytical methods
Hradil, David ; Fogaš, I. ; Miliani, C. ; Daffara, C.
Paintings of two authors of the Vienna school, Johann Baptist Lampi elder and Johann Baptist Lampi younger, have been analysed by combination of non-invasive and microanalytical methods. The most important dissimilarities in pallets of pigments were indicated by mobile XRF. Simultaneous presence of Sb and Sn indicated the use of unusual lead-tin-antimony yellow. This unusual pigment, structure of which was subsequently described by X-ray microdiffraction, was finally the only feature distinguishing the paintings. We concluded that it could be a sign of author’s preference.
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Electronic database of materials research of paintings
Hradilová, J. ; Beneš, Miroslav ; Zitová, Barbara
The article presents the database system, which enables to archive reports about material research during the analysis of painting art conservation. database structure was designed together with experts and it reflects methods for results archiving. Next to the archiving it offers the possibility to search through already stored reports, using both text-based and image-based approaches. The developed database together with implemented look-up functions forms the expert knowledge database.
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Naples yellow containing Sn in 18th - 19th century: Technological peculiarity or a forgotten pigment ?
Grygar, Tomáš ; Hradil, David ; Hradilová, Janka ; Bezdička, Petr ; Fogaš, I. ; Machovič, V.
Several Pb-containing yellow pigments were used in traditional European painting. Recipes for their production were probably adapted by those for yellow glass and enamel, having been known from antiquity. The popularity of one of them, Naples yellow, PB2Sb2O7, is strictly limited to the period from 17th to 19th century and its actual composition chanced within this period.
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