Roesch.etal 1993

Autor	Heinrich Rösch, Hans-Jürgen Schwarz
Jahr	1993
Titel	Damage to Frescoes caused by sulphate-bearing salts: Where does the salt come from?
Bibtex	[Roesch.etal:1993]Titel: Damage to Frescoes caused by sulphate-bearing salts: Where does the sulphur come from? Autor / Verfasser: Rösch, Heinrich; Schwarz, Hans-Jürgen
DOI
Link	URL: http://www.jstor.org/stable/1506367, Volltext: Datei:S1993rosch.pdf
Bemerkungen	In: Studies in Conservation, 38, 4, pp. 224-230.

Eintrag in der Bibliographie

[Roesch.etal:1993]

Rösch, Heinrich; Schwarz, Hans-Jürgen (1993): Damage to Frescoes caused by sulphate-bearing salts: Where does the sulphur come from?. In: Studies in Conservation, 38 (4), 224-230, Webadresse

Abstract

Crystallization of sulphates in the form of gypsum and mirabilite/thenardite is one of the main causes of the accelerated disintegration of historic frescoes. The sulphur, which is necessary for these processes, may originate from a large number of different sources. Although the nature and velocity of the processes causing the damage, as well as the possible transport pathways of the salt-forming ions, can be determined with reasonable accuracy, reliable information on the origin of the ions is seldom forthcoming. Sulphur isotope ratios were determined for various construction materials and salts from the church at Eilsum (Lower Saxony, Germany) where the romanesque frescoes have suffered serious damage. The studies showed clearly that sulphate on the walls inside the church, in contrast to that on the outside walls, originates mainly from the ground beneath the church from where capillary rise takes place within the walls. This information on sources and pathways of salt-forming ions may contribute towards developing a programme of remedial measures.

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