Head of an old man

Create a light sketch outlining the basic shapes and proportions of the head and shoulders.

Establish the background color with a thin wash of burnt umber and raw sienna.

Block in the main areas of light and shadow on the face using a mid-tone mixture of raw sienna, white, and a touch of red.

Refine the skin tones by adding highlights with white and yellow ochre, and shadows with burnt umber and alizarin crimson.

Pay close attention to the planes of the face and use directional brushstrokes to define form.

Paint the dark clothing with a mixture of black and burnt umber, using thicker paint and bolder strokes.

Add details to the collar and hair, using small brushes and careful observation.

Glaze the painting with thin layers of color to unify the tones and add depth.