Number of the records: 1
Signs of degradation of czech art nouveau mosaic glasses
- 1.
SYSNO ASEP 0390201 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title Signs of degradation of czech art nouveau mosaic glasses Author(s) Rohanová, D. (CZ)
Švarcová, Silvie (UACH-T) SAI, RID, ORCID
Hájek, T. (CZ)Source Title ACTA ARTIS ACADEMICA 2012: KNOWLEDGE AND EXPERIENCE IN THE FINE ART. - PRAHA : Akademie výtvarných umění v Praze, 2012 - ISBN 978-80-87108-33-8 Pages s. 227-235 Number of pages 8 s. Publication form Print - P Action Interdisciplinary Conference of ALMA /4./ Event date 21.11.2012-23.11.2012 VEvent location Praha Country CZ - Czech Republic Event type EUR Language eng - English Country CZ - Czech Republic Keywords glass mosaic ; tesserae ; glass corrosion ; Victor Foerster ; lead glass ; Art Nouveau Subject RIV CA - Inorganic Chemistry Institutional support UACH-T - RVO:61388980 UT WOS 000313137700013 Annotation Analyses of Art Nouveau mosaics from the church of St. Simon and Juda in Dolín near Slaný and from Holovousy, both most likely made by the workshop of Viktor Foerster, have shown that the author used the NaO-PbO-SiO 22 glass type and that he used the same glass also for restoration of The Last Judgment mosaic at the Prague Castle in 1890-1910. Despite the fact that lead glasses are more durable than potassium glasses, the material investigations identified corrosion processes on the surface of the glass pieces (tesserae) depending on their composition. Apart from the analyzed mosaic NaO-PbO-SiO2 glasses, we also used ancient sodium glasses (NaO-CaO-SiO2) and 22 potassium glasses (K2O-CaO-SiO2) from archaeological finds in Opava to demonstrate their different chemical durability. We also paid attention to fixation binders used in Art Nouveau mosaics. Inappropriate use of gypsum-containing binders is a significant cause of disintegration of the mosaics. Gypsum and gypsum-lime plasters are very sensitive to humidity. Capillary action of water is a very serious problem that endangers the overall lifespan of any mosaic. Workplace Institute of Inorganic Chemistry Contact Jana Kroneislová, krone@iic.cas.cz, Tel.: 311 236 931 Year of Publishing 2013
Number of the records: 1