Winsor & Newton Artists' Oil Colour is unmatched for its purity, quality and reliability - a success which is reflected in its world-wide reputation amongst professional artists. Every Winsor & Newton Artists' Oil Colour is individually formulated to enhance each pigment's natural characteristics and ensure stability of colour. By exercising maximum quality control throughout all stages of manufacture, selecting the most suitable drying oils and method of pigment dispersion, the unique individual properties of each colour are preserved. Combined with over 180 years of manufacturing and quality control expertise, the formulation of Artist's Oil Colour ensures the best raw materials are made into the World's Finest Colours. French Ultramarine is a rich transparent blue. It was created by French chemist Guimet in 1828 as a synthetic but chemically identical alternative to the expensive pigment derived from Lapis Lazuli.