Gamblin Artists Oils are based on alkali refined linseed oil as a binder. It yellows significantly less than cold pressed linseed oil, the traditional binder in oil paints, and makes a strong, flexible paint film. Robert Gamblin has sought out the finest grades of pigment available (yes, there are differences). He has constructed a paint of exceptional durability in a color palette that is proof of his devotion to painter's real concerns. All colors are mixed and packed by a dedicated crew of 20 employees in their sun-drenched (at least when we visited) factory in Southeast Portland. Robert's concern with the longevity of oil paint has led him to national recognition and extensive collaboration with groups such as the National Gallery in Washington, DC. Recently, Gamblin was commissioned to formulate a custom gold finish that was applied to the entire ceiling of the newly rehabilitated Radio City Music Hall in New York City. Robert Gamblin is evangelistic about creating safe environments and work habits for oil painters. We carry all of Gamblin's safe solvent related mediums. We encourage you to check out the extensive information on personally and environmentally responsible studio practices available from Gamblin. This is a paint you can trust from a company we believe in. Made with the finest refined linseed oils, each color retains the unique characteristics of the pigments, including tinting strength, undertone, and texture.