Fig. 6From: Odilon Redon’s noir drawings: characterization of materials and methods using noninvasive imaging and spectroscopiesRIS of Apparition. (Left) Detail color image. (Center) False-color infrared reflectogram created using 1575, 1352, and 1150 nm bands as RGB channels, respectively. (Right) Plot of spectra from the paper (green), Black 1 (magenta), brown charcoal or Black 5 (blue), and black charcoal or Black 6 (red)Back to article page