Winsor & Newton carefully formulates each tone for stability, tinting strength and coverage. Use them thickly with palette knives or brushes, or thin them to a very fine glaze.maximum pigment content consistent with good handling qualities, so optimum tinting strength can be achieved when the colours are reduced with white. 

Artist oil colour 37 ml - Prussian Blue Colour. 
Fine pigment.    
Buttery, vibrant and consistent.