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Plasticiser loss in heritage collections: its prevalence, cause, effect, and methods for analysis
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This review examined the causes, prevalence, effects, and analysis methods associated with plasticiser loss from plastic artefacts in museum heritage collections, focusing particularly on plasticised PVC and cellulose acetate materials. It drew on conservation science and indoor air quality research to explain how intrinsic material properties and environmental conditions drive plasticiser migration and volatilisation, with practical implications for preventive conservation.
Abstract Plasticiser loss is a topic frequently mentioned in discussions on the degradation of plastic artefacts in museum collections, particularly for plasticised poly (vinyl chloride) and cellulose acetate. Plasticisers may migrate to the plastic’s surface and remain as a deposit, or volatilise into the surrounding environment, both presenting an aesthetic issue and impacting the future stability of the plastic. This paper draws on the work of conservation science, materials degradation, and indoor air quality/emissions studies, to review our current understanding of plasticiser loss. The influence of the material’s intrinsic properties, and environmental factors on migration rates are discussed and related to preventive conservation practices. The methods by which plasticiser migration is studied, including characterisation, are also reviewed, with a particular focus on minimally invasive and non-destructive methods suitable for heritage science research.
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