Imprimatura
The imprimatura is a thin, transparent layer of paint—usually a warm, earthy color like raw umber—that artists apply to a white canvas or panel at the beginning of a painting.
Its purpose is to:
- Tone down the white of the canvas, which can be too bright and distracting 
- Unify the colors in the painting 
- Help judge values (lights and darks) more accurately 
It’s like giving the canvas a warm “base coat” before building up the painting in layers.
 
                        