Fig. 4
From: New insights into iron-gall inks through the use of historically accurate reconstructions
Raman spectra for the ink reconstructions, applied on filter paper, λ = 785 nm
Fig. 4 | Heritage Science
From: New insights into iron-gall inks through the use of historically accurate reconstructions
Raman spectra for the ink reconstructions, applied on filter paper, λ = 785 nm