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      UNFAVORABLE MICROCLIMATE CONDITIONS IN EXHIBITION ROOMS: EARLY DETECTION, RISK IDENTIFICATION, AND PREVENTIVE CONSERVATION MEASURES

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          Abstract

          This paper discusses the variability in space and time of microclimate in exhibition rooms and the related impact on collections composed of organic materials. The main deterioration mechanisms and risk assessment tools are highlighted. The historic climate, recommended by the EU standard EN 15757:2010 to avoid mechanical damage for the conservation of organic hygroscopic materials is elucidated. The limits of tolerable temperature (T) and relative humidity (RH) variability on the long (seasonal) and short time-scale (fluctuations) are also presented. The uneven distribution of heat in a room, especially in the corners or behind furniture, creates a habitat favorable to mold infestation. Special temperature T and RH diagrams, produced under the EU funded “Climate for Culture” project, are useful to assess risk for infestation by insects and molds, as well as the risk of damage (deformation, cracking, or blistering) for wooden objects or polychromy. A discussion concerns the possibility of killing insects and molds with high or low temperatures, or using the vacuum cleaner. The lifetime of cellulose (paper and textiles) is also considered. The exhibition lighting is considered in light of two EU standards, i.e. CIE 157:2004 and CEN TS 16163: 2014. The standards provide useful recommendations about light sources, emission spectra, illuminance, and upper limit of annual luminous exposure for photosensitive surfaces. Finally, the paper presents the EU standard EN 15999-1: 2014 that is a guideline for design of showcases for exhibition and preservation of collections. It provides general instructions to reduce the risk of physical damage to exhibits (e.g. theft, vandalism, natural disasters) and to improve the control of environmental parameters (e.g. T, RH, dust, pollutants and light).

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          The representative concentration pathways: an overview

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            Corrosion of Copper and Lead by Formaldehyde, Formic and Acetic Acid Vapours

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              Author and article information

              Journal
              16465806
              JOURNAL OF PALEONTOLOGICAL TECHNIQUES
              GEAL, Museu da Lourinha (Portugal )
              1646-5806
              2016
              : 15
              : 144-161
              Affiliations
              [National Research Council (CNR), Institute of Atmospheric Sciences and Climate (ISAC), Padua, Italy ]
              [Norwegian University of Science and Technology (NTNU) - Department of Architectural Design, History and Technology, Trondheim, Norway ]
              Article
              © 2016 Camuffo and Bertolin

              This is an open access article distributed under the terms of the Creative Commons Attribution 3.0 Unported License

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              Research article

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