Now that the color background layer is started, the painting is starting to have some atmosphere. In this image, I have begun to add a deeper, sharper layer of Burnt Sienna with a touch of Ivory Black. The large value masses begin to give depth to the portrait, but they have a cookie-cutter effect due to their hard edges. These will be softened where needed. Note how the lighter & whiter areas of the face are beginning to "pop" - becoming more contrasty and prominent.
Compare this to the first wash to see the transition from thin paint to slightly thicker.