Grumbacher artist's oil paint sets. Choose from Academy and Pre-Tested oil paint sets. Grumbacher Academy: Quality oil paint produced in the tradition of the old masters. Wide range of rich, vibrant colors has been popular with artists for generations. Rich, buttery texture combined with a wide range of vibrant colors make Grumbacher Pre-Tested oil paints a favorite among instructors and professionals. Each color is comprised of pure pigments and refine linseed oil, tested several times throughout the manufacturing process. The result is consistently smooth, brilliant color with excellent performance and permanence. Each oil art paint set contains 10 24ml (.81 oz.) tubes in a variety of vibrant colors.