Walnut Oil Preferred by artists for over five centuries, free flowing Walnut Oil gives the artist greater freedom and control over their color without the addition of solvents. Revival of this fine oil has allowed the creation of a contemporary professional oil color with extremely high concentrations of pigment, freedom from discoloration and superior handling properties.Walnut oil is a pale yellow-brown oil (when newly made it's a pale oil with a greenish tinge) that has a distinctive smell. As it's a thin oil, it's used to make oil paint more fluid. As it yellows less than linseed oil (but more than safflower oil) it's good for pale colors. Walnut oil dries in four or five days. It's an expensive oil and must be stored correctly otherwise it goes rancid (off). Walnuts naturally contain about 65 per cent oil.Walnut Alkyd MediumWalnut/Alkyd Medium was developed to provide artist's with a non-toxic, environmentally responsible alternative to solvent based, rapid drying alkyd mediums. This is a medium that closely resembles the wonderful combinations of sun-thickened oil and natural resins used so effectively throughout the history of art but with the singular advantage of being free from solvents.