Fig. 4
From: Beneficial effect of gelatin on iron gall ink corrosion
Mapping of the inked sized fiber (G_I). a SEM image of the whole section; b restricted area corresponding to the yellow square of a with regions of interest (numbers 4–7) chosen to extract NEXAFS spectra shown on Fig. 3b. c STXM map of the restricted area at the N K-edge representing gelatin distribution (401 eV subtracted by 398 eV to enhance the contrast); d Fe L-edge STXM maps at 708 eV (subtracted by the maps at 700 eV) related to FeII distribution; e Fe L-edge maps at 709.8 eV (subtracted by the map at 708 eV) related to FeIII distribution; f RGB map at the Fe L-edge; g C K-edge STXM maps at 287.7 eV (subtracted by the map at 280 eV) related to gallic acid distribution; h STXM maps at the C K-edge at 288.8 eV (subtracted by the map at 280 eV) related to cellulose distribution; i RGB map at the C K-edge