The portraits here begin with an underpainting that is built up in a series of glazes. The shadows are deepened and white is introduced to develop strong lights and delicate halftones.
Colour is applied once the tones are fully established. The underpainting gives the portrait a tonal foundation that can increase the depth and naturalism of the finished work.
Portraits from life usually require 4 to 6 sittings of about 2 or 3 hours each. Where sittings are not an option, suitable photographic reference can be used. A portrait will normally take around 3 months to complete.