The transport of paintings in microclimate display cases

Abstract

Microclimate display cases have been used for many years to exhibit paintings in buildings that have undesirable levels of relative humidity. In most instances, silica gel is included as a buffer, reducing relative humidity variations that may result from case leakage. When paintings are transported for exhibitions, temperature, relative humidity and pressure changes in the transit environment are often unavoidable. This paper reports on an investigation of the environmental variations within microclimate cases during transit. In addition, it discusses the dimensional response of wood veneers and panel paintings transported in microclimate display cases. Strain gages were used to measure the dimensional changes that occurred during experiments in an environmental test chamber and during transit. Experiments were also conducted to investigate the deflection, caused by pressure changes, of acrylic glazing materials used in the construction of microclimate display cases. Research to date suggests that acrylic glazing materials may come into contact with the surface of paintings during air transport.

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