Excellent quality oil paints, available in 75 colours Made with slow-drying and non-yellowing Walnut Oil - used extensively by the artists of the European Renaissance Free flowing, remains wet for longer than most artist oils Can be mixed with any other oil paints and mediums Prussian Blue is a traditional iron blue with great tinting strength. More subtle than Phthalocyanine Blue. Beautiful glazing colour. These excellent quality oil paints are rich, luminous and full of pigment. The American Walnut Oil used in M. Graham Artists’ Oil Paint dries to a clear film which will not yellow, allowing the true colour of the pigments to shine through. This is a 37ml tube of M. Graham Artists' Oil Paint in Prussian Blue.