Produced under the close supervision of Robert Gamblin, these beautiful artist oil Colors are formulated using pure Pigments and refined linseed oils. No adulterants are Used in the process, so Each Color retains its Unique characteristics of tinting strength, undertone and Texture. Gamblin manufactures oil Painting Materials from a formula developed by Robert Gamblin to serve two purposes. Firstly, Gamblin Artist's Colors have luscious working properties so that Painters may enjoy Each Color's Unique properties. Secondly, Gamblin Artist's Oil Color Paints Colors produce permanent Paintings that will be radiant for generations. Art Materials are always best when made by those who appreciate the potential in the artist's mark. We're sure you'll agree that the Quality of these oil Colors is exquisite.