An analytical method for the characterization of microclimates for the conservation of wooden Cultural Heritage objects (Contributo in atti di convegno)

Type
Label
  • An analytical method for the characterization of microclimates for the conservation of wooden Cultural Heritage objects (Contributo in atti di convegno) (literal)
Anno
  • 2005-01-01T00:00:00+01:00 (literal)
Alternative label
  • Dionisi Vici P, De Vincenzi M., Uzielli L. (2005)
    An analytical method for the characterization of microclimates for the conservation of wooden Cultural Heritage objects
    in Art05 8th International Conference on “Non-Destructive Investigations and Microanalysis for the Diagnostics and Conservation of the Cultural and Environmental Heritage”15-19 May 2005., Lecce, 15-19 May 2005
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Dionisi Vici P, De Vincenzi M., Uzielli L. (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • DISTAF University of Florence CNR-IBIMET Laboratory for Monitoring of Agroecosystems - Sassari DISTAF University of Florence (literal)
Titolo
  • An analytical method for the characterization of microclimates for the conservation of wooden Cultural Heritage objects (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#isbn
  • 9788889758007 (literal)
Abstract
  • Most of the museum conservation standards are based on \"static\" criteria, specifying \"acceptable\" or \"optimal\" ranges for Temperature and Relative Humidity for the welfare of the artefacts to be conserved; no clear specifications are usually given for their evolution in time. Such approach appears unsatisfactory for artefacts made of wood, which not only is highly hygroscopic, but also conserves a \"memory\" of the climate to which it has been previously exposed. The work reported in this paper is carried out in the framework of studies aiming towards more effective specifications. It proposes a dynamic method for characterizing real microclimates from the point of view of the conservation of wooden artefacts belonging to the Cultural Heritage; such characterization considering the environmental parameters which may cause biological decay and/or mechanical damage caused, at equilibrium or during transients, by shrinkage/swelling and the connected distortions and/or stresses. The proposed method is based on analytical algorithms, to be applied to recorded or specified climatic data. Firstly the variation in time of typical EMC (Equilibrium Moisture Content) of wood is computed, then the resulting time series is processed in order to compute 1 DISTAF University of Florence 2 CNR-IBIMET Laboratory for Monitoring of Agroecosystems - Sassari. 2 the number, duration and size of periods during which EMC remains stable or changes. Computation is performed using several values of the two parameters ? (defining the stability criterion) and Tmin (defining the minimum duration for any period to be considered significant). The proposed method itself can not identify if given environmental conditions may in general be harmful for the wooden artworks; however, on the basis of the characterization that it provides, experts in conservation may express objective judgments/evaluations about its suitability for individual artworks. In this paper two very different climatic conditions have also been analysed using the proposed method: one is the rather stable indoor environment of a monumental hall in a Middle Age building, located in the centre of Florence (Italy); the second one is a quite unstable outdoor environment, also in the Florence area. The results of the analysis highlight objectively strong differences between the two environments; however, the proposed method is still at an initial stage, and needs to be reviewed and refined in order to provide more synthetic and significant indexes. (literal)
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