Step 2I have begun to lay in "local" colors in semi-transparent glazes of egg tempera: yellow ochre, ivory black, raw umber, verdaccio, and Vagone green, all tinted with varying amounts of zinc white. Zinc is the most transparent pure white pigment, and thus does not obscure the underpainting. The head took several glazes of straight green earth, without any white added. Before jumping to these egg tempera washes, I sized the casein underpainting with several thin coats of dilute yolk and water to cut the absorbency of the casein and permit the initial tempera glazes to flow on a little more easily. I'll continue to refine the image's colors and details with mostly transparent or translucent glazes, and build up to more opaque passages towards the end.
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