After choosing a round developed in its height pebble and having washed and dried it carefully, cover it completely with one layer of black color and sketch the drawing with a white pencil.

For the light shadows I used a medium gray with which I tried to light up the exposed parts such as the leg, the shoulders, parts of the face and the head.

Mix Rose with a pinch of Sienna Burnt and rough sketch the snout, the eyebrows, the hands, the ears, the knee. Mitigate Rose colour with some Black.

With two parts of Sienna Burnt and one of Rose shadow and define the whole snout, the eyebrows and outline the eyes.

Trace an inferior semimoon with Burnt Umber, add a heightener with Sienna Burnt. When dry, add a black pupil and one or two white dots.

Before passing to the hair phase, heightening the parts in light with a light yellow (I used a color obtained mixing Raw Sienna Earth and Yellow).

Enriched the whole mantle with light gray hairs, specially its arms, legs, face and head. Mitigate the effect with black hairs where necessary. Before signing your chimpanzee, give Frank two coats of opaque transparent varnish..either spray or brush-on. The varnish protects the paint from chipping, and give a brighter color to it.