Affiliation: | 1. Image Permanence Institute, Rochester Institute of Technology, 70 Lomb Memorial Drive, Rochester, NY, 14623, USA 3. Conservation Department, Tate, Millbank, London, SW1P 4RG, UK 4. School of Science and Technology, Nottingham Trent University, Nottingham, NG11 8NS, UK 2. The National Archives, Kew Richmond, Surrey, TW9 4DU, UK
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