Spara och bevara* bibliographic database

Arnold, A and Zehnder, K (1991) Monitoring Wall Paintings Affected by Soluble Salts. In: The conservation of wall paintings; proceedings of a symposium organized by the Courtauld Institute of Art and the Getty Conservation Institute, London, July 13-16 1987. Getty Conservation Institute , pp. 103-135. ISBN 0-89236-162-X

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The general features of the evolution of salt systems in walls is studied first, starting with the genesis of the ions. The behavior of the salt concentration is examined next under the following headings: transport, accumulation, solute concentration, precipitation, fractionation, and local concentration. How crystallization and hydration pressures build up and burst stone and plaster structures is investigated next. This is shown as a four-phase process, where a model is used that is applicable to all moderately porous materials. A separate aspect of decay consists in the crystallization of salt phases from a mixture of different solutes controlled by relative humidity. Here, observation, determination, and documentation of decay forms are reported as conducted on six churches in Switzerland, in a project known as N.R.P. 16, some heated continuously, some intermittently, and some unheated. The findings stress that only when accurate climate measurements are coordinated with in situ observations can a relationship be established and monitored among the variables of room climate, i.e. relative humidity and temperature, the crystallization of distinct salts, and the decay they produce. The last section is based on a 1986 integrated study of the decay and environmental conditions in the Convent Church at Mustair. It presents a methodological approach to monitoring wall paintings affected by salt weathering, and presents a program of concerted actions in short and reversible steps taken to reduce the frequency of salt crystallization.

Item Type: Book Section
Uncontrolled Keywords: Salt; Wall painting; Salt damage; Church; Monitoring
Subjects: ?? Salt ??
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English > Damage functions > Salt damage
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Depositing User: Anna Samuelsson
Date Deposited: 07 Apr 2008 13:33
Last Modified: 04 Apr 2017 12:50

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