Gamblin Artist Grade Oil Colours are true to the working properties of traditional oils, yet designed to provide artists with safer, more permanent painting materials. Gamblin Artist's Oils are based on alkali refined linseed oil as a binder rather than than cold pressed linseed oil (the traditional binder in oil paints) since it yellows significantly less. Using only the finest raw materials, the longevity of Gamblin Oil's strong, flexible paint film is only matched by its luscious colour. Handcrafted in the company's wind-powered factory in Portland, Oregon with dedication for exceptional durability and studio safety.