Jean Corbechon, Livre des propriétés des choses
Painting the flesh
The Mazarine Master applied flesh tones over a light pink base layer, containing lead white and variable quantities of vermilion. He used a range of earth pigments to delineate shadows, and short parallel strokes of vermilion red to define noses, cheeks and mouths, and often eyebrows and foreheads. Facial features were further outlined in brown or black.