µ-XRF Studies on the Colour Brilliance in Ancient Wool Carpets

Figure 4

Wool fibres recently dyed with madder roots and FeSO₄. (a) and (b) Fitted X-ray fluorescence maps of an exemplary fibre at the S and Fe K-edges (7.2 keV excitation energy, 1.6 s acquisition per pixel). (c) Calibrated Fe content for the Fe mordant containing specimen and a blank sample (average values for several single fibres).

(a)

(b)

(c)