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Vivianite: A historic blue pigment and its degradation under scrutiny

  1. 1.
    0441806 - ÚACH 2015 RIV US eng C - Konferenční příspěvek (zahraniční konf.)
    Čermáková, Zdeňka - Švarcová, Silvie - Hradil, David - Bauerová, P. - Hradilová, J. - Bezdička, Petr
    Vivianite: A historic blue pigment and its degradation under scrutiny.
    Science and technology for the conservation of cultural heritage. Boca Raton, Florida: CRC Press, 2013, s. 75-78. ISBN 978-1-138-00009-4.
    [International Congress on Science and technology for the conservation of cultural heritage. Santiago de Compostela (ES), 02.10.2012-05.10.2012]
    Institucionální podpora: RVO:61388980
    Klíčová slova: vivianite * degradation * micro-FTIR * micro-ATR * SEM-EDS
    Kód oboru RIV: AL - Umění, architektura, kulturní dědictví

    Vivianite is a mineral that was used as a blue painting pigment. However, in several artworks, vivianite has degraded to grey or yellowish colour. Our study confirmed the following degradation series caused by oxidation: vivianite-metavivianite-Fe3+ analogue of metavivianite-santabarbaraite. A procedure of identification of vivianite or its degradation products in microsamples of painted artworks was suggested (SEM-EDS followed by mu-ATR mu-FTIR). Vivianite was synthesized by an optimized method and model samples with water and linseed stand oil were created. These were subjected to artificial ageing in a climate chamber by intense UV light; these experiments are on-going.
    Trvalý link: http://hdl.handle.net/11104/0244782
     
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