Fig. 8
From: Reconstructing Van Gogh’s palette to determine the optical characteristics of his paints

a Kubelka–Munk K and S values calculated for emerald green reconstruction paint, assuming various amounts of barium sulphate to be mixed in. b Kubelka–Munk K and S values for emerald green as determined from aged emerald green pigment on Field with Irises near Arles [14]