Sennelier Oil Sticks are made of artist quality oil paint in a solid format. A proportion of oil is substituted with a neutral mineral wax, resulting in the stick appearance. Sennelier Oil Sticks contain the highest quality pure pigments ground into vegetable oils selected for their low degree of yellowing over time. Oil sticks offer the same advantages as oil paint. but have a much faster drying time. Before using an oil stick for the very first time, peel off the thin dry skin in order to release the paint. This thin layer will form again after you have used it. Colours in this set includes: Titanium White, Ivory Black, Primary Yellow, Primary Red, Primary Blue and Viridian.