Fig. 1
From: Beneficial effect of gelatin on iron gall ink corrosion
NEXAFS spectra of reference compounds at the three edges studied. a Reference of iron(II) chloride (FeII_ref) and iron(III) chloride (FeIII_ref) at the Fe L-edge; b gelatin (G) at the N K-edge and c C K-edge of gallic acid reference (Ac), iron-gallate ink precipitate (IGI), gelatin (G) and raw linen rag fiber (fiber). Attribution was based on several previous studies [34, 37,38,39,40,41]