Artist oil 37 ml tube Charcoal grey 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. The AOC range consists of 116 vibrant colours, made only from the finest pigments & offering the widest spectrum of all the Winsor & Newton oil ranges. Each tone is carefully formulated for stability, tinting strength and coverage. There are 80 single pigment colours in the range. Single pigments provide a wide colour range in themselves and offer cleaner, brighter mixtures with an infinite range of hues. Single pigment 'secondaries' considerably broaden the artists' available spectrum. The stiff consistency of Winsor & Newton colours can retain brush or palette knife marks or it can be thinned to the very finest of glazes. The thick consistency & pigment strength result in great covering power. Artists' Oil Colour is formulated to provide as even a reflective surface as possible. The surface sheen may differ from colour to colour. W&N have been developing permanent alternatives for the less durable traditional colours, without compromising the handling properties of their oils. 115 of 116 colours are now classified as permanent for artists' use. Liquin Original is the perfect medium to speed the drying time of oil colour. It will speed the drying by approximately 50%.