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Looking beneath Dali's paint: non-destructive canvas analysis

Oriola, M; Mozir, A; Garside, P; Campo, G; Nualart-Torroja, A; Civil, I; Odlyha, M; ... Strlic, M; + view all (2014) Looking beneath Dali's paint: non-destructive canvas analysis. Analytical Methods , 6 (1) pp. 86-96. 10.1039/c3ay41094c. Green open access

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Abstract

A new analytical method was developed to non-destructively determine pH and degree of polymerisation (DP) of cellulose in fibres in 19th–20th century painting canvases, and to identify the fibre type: cotton, linen, hemp, ramie or jute. The method is based on NIR spectroscopy and multivariate data analysis, while for calibration and validation a reference collection of 199 historical canvas samples was used. The reference collection was analysed destructively using microscopy and chemical analytical methods. Partial least squares regression was used to build quantitative methods to determine pH and DP, and linear discriminant analysis was used to determine the fibre type. To interpret the obtained chemical information, an expert assessment panel developed a categorisation system to discriminate between canvases that may not be fit to withstand excessive mechanical stress, e.g. transportation. The limiting DP for this category was found to be 600. With the new method and categorisation system, canvases of 12 Dalí paintings from the Fundació Gala-Salvador Dalí (Figueres, Spain) were non-destructively analysed for pH, DP and fibre type, and their fitness determined, which informs conservation recommendations. The study demonstrates that collection-wide canvas condition surveys can be performed efficiently and non-destructively, which could significantly improve collection management.

Type: Article
Title: Looking beneath Dali's paint: non-destructive canvas analysis
Open access status: An open access version is available from UCL Discovery
DOI: 10.1039/c3ay41094c
Publisher version: http://dx.doi.org/10.1039/c3ay41094c
Language: English
Additional information: This journal is © The Royal Society of Chemistry 2014. This Open Access Article is licensed under a Creative Commons Attribution 3.0 Unported Licence
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Medical Sciences > Eastman Dental Institute
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of the Built Environment
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of the Built Environment > Bartlett School Env, Energy and Resources
URI: https://discovery.ucl.ac.uk/id/eprint/1417860
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