Series 2Made from pure concentrated pigment, the finest safflower oil, and high quality mineral wax, Sennelier's Oil Sticks can be used alone or in combination with tube oil paints. Like regular oils, they can be diluted with turpentine. They dry to a hard film.These creamy, very lightfast sticks can be used for sketching, or for producing complete works of art on any traditional oil painting surface. With Sennelier Artists' Oil Sticks, nothing needs to come between the artist's hand and the canvas.