The money head above is what I draed wby white charcol on a black paper during my representational class.

The hand and its opposite side. This is actually one drawing, I spit it by photoshop. I tried to create an contrast by using opposite side of hands and oppsite color.

The protrait of a Harlequin. It is a reproduction of Picasso's painting. It is the one which I explored the skill of color glazing. In this painting. The bottom left coner was painted by black and white.