Fig. 7: Raman spectra of pigment samples.
a SP-1 green; b SP-1 black; c SP-2 red; d SP-3 reddish orange; e SP-4 white.
Fig. 7: Raman spectra of pigment samples. | npj Heritage Science
a SP-1 green; b SP-1 black; c SP-2 red; d SP-3 reddish orange; e SP-4 white.
