Cit:Heritage.etal:2008

Autor	Heritage, Adrian and Sawdy, Alison and Funke, Fredericke and Vergès-Belmin, Veronique and Bourgès, Anne
Jahr	2008
Titel	How do conservators tackle desalination? An international survey of current poulticing methods
Bibtex
DOI	https;//doi.org/10.1179/204705811X13159282692923
Link	https://www.researchgate.net/profile/Alison-Heritage/publication/284044658_How_do_conservators_tackle_desalination_An_international_survey_of_current_poulticing_methods/links/5d512f2f4585153e594eabae/How-do-conservators-tackle-desalination-An-international-survey-of-current-poulticing-methods.pdf
Bemerkungen	in:

Eintrag in der Bibliographie

[Heritage.etal:2008]

Heritage, Adrian; Sawdy, Alison; Funke, Fredericke; Vergès-Belmin, Veronique; Bourgès, Anne (2008): How do conservators tackle desalination? An international survey of current poulticing methods. In: forthcoming (Hrsg.):, .

Abstract

Cellulose poultices are frequently used in stone and wall painting conservation for the purposes of soluble salt extraction, consolidation and cleaning.They have the reputation of being easy and pleasant to work with, have a neutral pH, high water absorption and plasticity, exhibit good conformance and adhesion to the substrate, and in most cases leave minimal residues after clearance.The cellulosic materials from which they are composed range from cotton wool, blotting paper or newspaper, to cellulose powders, the latter now by far the most common form of cellulose used today by conservators. Drawbacks of these products include poor water retention when applied to vertical surfaces, a tendency to redistribute salts further into the object substrate, and poor long-term treatment effectiveness for salt extraction. Hence cellulose poultices are used frequently due to good working properties, but apparently are in some situations not very effective. In this paper, existing knowledge of these poultices is outlined, followed by investigations undertaken to fill some of the knowledge gaps. Investigations include characterization of poultice properties such as pore size distribution and workability, and of moisture transport processes within poultice/substrate systems including moisture penetration depth, moisture distribution, and poultice shrinkage during drying. Cellulose powder products known under the trade name Arbocel®, extensively tested and used in conservation over several decades, were a particular focus. Resulting guidelines include counter-intuitive measures such as (when used for salt extraction purposes) the use of thinner poultices to reduce drying shrinkage and salt redistribution further into the substrate.The relatively uniform pore size distribution (around 10 µm) of Arbocel® poultices makes them more appropriate for salt extraction on substrates with a medium-coarse pore size (i.e. 15 µm and above), while on fine porous substrates (10 µm and below), the extraction will not be as efficient.

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