Sap Green is a bright mid-range green with a yellow undertone. Originally Sap Green was a lake pigment made from unripe Buckthorn berries.

Cotman Watercolours use fine art pigments with reduced pigment load than the Professional Watercolour range, making them an accessible choice while still uncompromising on quality. Rated AA and A for Excellent and Good lightfastness, Cotman Watercolour gives artist the reassurance expected from a quality watercolour range.