Fig. 7

False color rendering obtained from the Vis–NIR multispectral analysis of the upper right corner of Alchemy. a visible image; b distribution of lead white (grey) and white1 (blue) paints (R = 1940 nm, G = 1400 nm, B = 590 nm); c distribution of red1 and red2 paints (R = 765 nm, G = 630 nm, B = 455 nm); d distribution of deep red and violet paints (R = 765 nm, G = 630 nm, B = 455 nm); e distribution of green1 and green2 paints (R = 950 nm, G = 765 nm, B = 455 nm); f distribution of blue1 and blue2 paints (R = 765 nm, G = 630 nm, B = 455 nm)