Gamblin Artist's Oil Colors are produced with an alkali-refined linseed oil as a binder. The use of this binder results in a strong, flexible paint film, which does not yellow as much when compared to the traditional binder, cold pressed linseed oil. Gamblin only uses the finest grades of pigment available to create a paint of exceptional durability. Made with the finest refined linseed oils, each color retains the unique characteristics of the pigments, including tinting strength, undertone, and texture. All colors are mixed and packed in the United States and all paints have little to no toxicity.