Fig. 11From: Does substrate colour affect the visual appearance of gilded medieval sculptures? Part I: colorimetry and interferometric microscopy of gilded modelsRadially averaged 2D power spectral density (PSD) of surface topologies and the corresponding height map images for the “nb”, “b” and substrate areas of models with different gilding techniques “b1_dg”, “w1_dg” and “w4_dg_oil”. Note that “w4_dg_oil” does not have a “b” sub-model and the roughness measurements of its substrate were performed on the ground rather than on the gold sizeBack to article page