Degradation of lead-based pigments by salt solutions

0340400 - ÚACH 2010 RIV FR eng J - Článek v odborném periodiku
Kotulanová, Eva - Bezdička, Petr - Hradil, David - Hradilová, J. - Švarcová, Silvie - Grygar, Tomáš
Degradation of lead-based pigments by salt solutions.
Journal of Cultural Heritage. Roč. 10, č. 3 (2009), s. 367-378. ISSN 1296-2074. E-ISSN 1778-3674
Grant CEP: GA ČR(CZ) GA203/07/1324; GA AV ČR KJB400320602
Výzkumný záměr: CEZ:AV0Z40320502
Klíčová slova: X-ray microdiffraction * salts * red lead
Kód oboru RIV: CA - Anorganická chemie
Impakt faktor: 1.505, rok: 2009

Interactions of lead-based pigments with a number of inorganic salts, one of the most dangerous degradation agents of wall paintings, were studied under laboratory conditions. The results were used to interpret colour changes observed in 11th century frescoes from the church of Saint George in Kostol'any pod Tribecom, the oldest preserved wall paintings in Slovakia. Interactions of selected pigments (lead white, massicot, red lead) with different salt solutions were performed within long-term laboratory experiments. We used a selection of naturally occurring salts (Na2SO4, MgSO4, CaSO4, NaCl, NaNO3, Ca(NO3)(2), Na2CO3, K2CO3 and urea) and, additionally, a range of synthetic salts that are often applied to the wall paintings during their cleaning and conservation (NaHCO3, KHCO3, (NH4)(2)CO3, NH4HCO3).
Trvalý link: http://hdl.handle.net/11104/0183647