About: Signs of degradation of czech art nouveau mosaic glasses

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	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. 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. (en)
Title	Signs of degradation of czech art nouveau mosaic glasses Signs of degradation of czech art nouveau mosaic glasses (en)
skos:prefLabel	Signs of degradation of czech art nouveau mosaic glasses Signs of degradation of czech art nouveau mosaic glasses (en)
skos:notation	RIV/61388980:_____/12:00390201!RIV13-AV0-61388980
http://linked.open...avai/predkladatel	Ústav anorganické chemie AV ČR, v.v.i.
http://linked.open...avai/riv/aktivita	I
http://linked.open...avai/riv/aktivity	I
http://linked.open...vai/riv/dodaniDat	2013
http://linked.open...aciTvurceVysledku	Švarcová, Silvie
http://linked.open.../riv/druhVysledku	D - Článek ve sborníku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Ústav anorganické chemie AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	167832
http://linked.open...ai/riv/idVysledku	RIV/61388980:_____/12:00390201
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	glass mosaic; tesserae; glass corrosion; Victor Foerster; lead glass; Art Nouveau (en)
http://linked.open.../riv/klicoveSlovo	Victor Foerster glass mosaic lead glass tesserae glass corrosion Art Nouveau
http://linked.open...ontrolniKodProRIV	[9EF12C540CC4]
http://linked.open...v/mistoKonaniAkce	Praha
http://linked.open...i/riv/mistoVydani	PRAHA
http://linked.open...i/riv/nazevZdroje	ACTA ARTIS ACADEMICA 2012: KNOWLEDGE AND EXPERIENCE IN THE FINE ART
http://linked.open...in/vavai/riv/obor	CA
http://linked.open...ichTvurcuVysledku	1 (xsd:int)
http://linked.open...cetTvurcuVysledku	3 (xsd:int)
http://linked.open...UplatneniVysledku	2012
http://linked.open...iv/tvurceVysledku	Hájek, T. Švarcová, Silvie Rohanová, D.
http://linked.open...vavai/riv/typAkce	EUR - Evropská
http://linked.open...ain/vavai/riv/wos	000313137700013
http://linked.open.../riv/zahajeniAkce	2012-11-21 (xsd:date)
number of pages	8 (xsd:int)
http://purl.org/ne...btex#hasPublisher	Akademie výtvarných umění v Praze
https://schema.org/isbn	978-80-87108-33-8
is http://linked.open...avai/riv/vysledek of	Signs of degradation of czech art nouveau mosaic glasses

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