The Three Glazes for Skin

Skin involves three sittings seen in the three photos: the first is burnt umber, the second is grisaille, and the third is a velatura, that is, a thin layer of skin colour comprised of yellow ochre, vermillion, and titanium white with a medium heavy on oil (60% linseed/40% mineral spirits). Then I put extra vermillion into the redder parts of the face, such as the nose, eyelids, lips, etc, and pure white for highlights.