Fig. 9

EDS spectrum acquired in a brownish-red particle in the top red layer in sample S2, and details of SEM-BSE images of this sample (×400 and ×1600) where the red arrows indicate the location of this particle (A). This is an additional fragment of sample S2, it differs from that shown in Fig. 8D–F. EDS spectrum acquired in a particle in the underpaint layer in sample S5 showing a similar composition to that presented in A and details of SEM-BSE images of this sample (×900 and ×1600) where the red arrows indicate the location of this particle (B)