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Heritage Science
Fig. 2 | Heritage Science

Fig. 2

From: Van Gogh’s Irises and Roses: the contribution of chemical analyses and imaging to the assessment of color changes in the red lake pigments

Fig. 2

Irises. Photomicrographs of the paint-cross sections removed from a flower taken with visible (a) and with UV illumination (b), original magnification ×200; and from the discolored background of the painting taken with visible (d) and with UV- illumination (e), original magnification ×200. c, f Electron backscattered (BSE) images of the samples shown in a and d, respectively, taken with ×230 and ×245 magnifications, respectively

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