Fig. 11

Radially 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 size