Fig. 7From: Identification of pigments used in a Qajar manuscript from Iran by using atomic and molecular spectroscopy and technical photography methodsFTIR spectra of blue, lead white, calcite and paper (a), with the second derivative of the spectra in the range 600-950 cm−1 (b), and peak deconvolution of blue pigment based on the Gaussian/Lorentzian function in the range 2560-2670 cm−1 (c)Back to article page