Fig. 4
From: Disclosing Jackson Pollock’s palette in Alchemy (1947) by non-invasive spectroscopies
Details of the visible image and key spectral features of deep red and violet paints. a XRF spectra; b Raman spectrum of deep red (λexc = 785 nm); c and d near-FTIR spectra of a violet paint compared with those of standard manganese phosphate
