Fig. 2From: Altered identity: fleeting colors and obscured surfaces in Van Gogh’s Landscapes in Paris, Arles, and Saint-Rémya BSE image, b polarized light, and c UV light microphotographs of cross section VG4 from Roadway with Underpass, i.e. ground preparation and paint. In the BSE image, 1 and 2 indicate, respectively, the bottom and top layers of the ground preparation, while the red arrow shows the location of the sulfur-, lead-, and potassium-containing layerBack to article page