Fig. 8
From: Jan Steen’s ground layers analysed with Principal Component Analysis
a ‘As the Old Sing, So Pipe the Young’, ca. 1668–70, oil on canvas, overview with cross section location marked with yellow X. b Cross section shown in bright field, layer 1 is the ground layer. c Cross section shown in UV. d Backscatter electron image at ×250 magnification. e Backscatter electron image at ×1000 magnification. f–k Elemental mappings of different elements, indicating the presence of earth pigments, lead tin yellow, vermillion and smalt