A classic, raw sienna is heated or calcined to bring out the inherent warmth of the natural Iron Oxides, thereby creating burnt sienna!
In masstone it is a rich chocolate brown, the swatch shown on the left has more red in it than the reality. It's tints when white is added produce instant mid-range (in temperature) flesh hues. The range of these flesh tints is wide as the paint is reasonably powerful.
Paints quite 'long', lean in body, meaning it is very easy to use without mediums. This takes a bit of getting use to however once you have there is no turning back.
There isn't a portrait painter who wouldn't this a useful addition to their palette.
The pigment for this paint is sourced from the last remaining quarry of Gargas and Rustrel nested in the heart of the Luberon Mountains in France. It is an authentic paint, with the pigment selected purely for it's colour qualities.
Pigment - Pbr7
Opacity - Semi-Transparent
Tinting Strength - Good
Binder - Linseed Oil