Fig. 8From: Non-invasive imaging and spectroscopy techniques for identifying historical pigments: a case study of Iranian manuscripts from the Qajar eraa FORS spectra of red pigment along with carmine lake; b deconvoluted FORS spectrum of red pigment by Fourier self-deconvolution method, which shows absorption bands of cochineal dye around 494, 523 and 569 nmBack to article page