Winsor & Newton Refined Linseed Oil is their most popular oil. It is a low viscosity alkali refined oil of pale colour that dries slowly. Refined Linseed Oil reduces the consistency of oil colours. It is more fluid than unrefined oils & helps increase gloss, transparency & flow of colours. Refined Linseed oil slows the drying of oil colours and is slower-drying than cold pressed Linseed.