The brushwork: flat blocks, not blended modelling
Anywhere across the face and background, the broad areas of unbroken color
The paint is laid in firm, flat sections of pure unmixed color, each one defining a feature or a zone, with hard edges between them rather than soft, blended transitions. This is closer to the flat color-areas of Gauguin and Van Gogh than to Impressionism’s flicker, and it is why the head reads as a built construction, almost a mask, rather than a soft, rounded, lifelike face.