Winsor & Newton Artisan Water Mixable Mediums, Painting Medium is a slow drying medium that reduces consistency and increases luminosity and flexibility of Artisan Oil Colour. It is ideal for oiling out and enriching dull patches. Resisting yellowing, it can be cleaned up with water, and can be thinned with Artisan thinner. Details:250 mlFor use with Artisan oil colorResists yellowing