Fig. 4From: Mapping the pigment distribution of Vermeer’s Girl with a Pearl Earringa Visible light detail of blue headscarf. René Gerritsen Art & Research Photography; b Maps made from the reflectance spectral endmembers (c) showing the use of ultramarine with varying amounts of lead white. d MA-XRF map of lead (Pb M); e MA-XRF map of lead (Pb L) with intensity adjusted to emphasise presence of lead in the face and headscarf rather than the background; f MA-XRF map of potassium (K K)Back to article page