Creamy, lightfast, and vibrant, Sennelier Oil Pastels Use the same high Quality Pigments and high Pigment loads as their other lines, combined with a pure, synthetic binding medium and mineral wax. As the binding medium does not oxidize, it will not jeopardize the artwork’s film stability or Surface. They are acid-free, so there is no need to prime any Surface as a preventative barrier for Protection against deterioration from acid. The neutral pH mineral wax provides a remarkably creamy Texture that will never harden or yellow, thus providing excellent adhesion to any support, without ever fearing cracking. They may be thinned with spike lavender oil, turpentine, or mineral spirits to make washes or soften drawing strokes, or blended with the Transparent Blending Medium stick for a wide array of effects. They are the ideal medium for artists on the go, as sets can be taken on airplanes without any restrictions since they contain no solvents or liquid oils like tubed Paints. Sennelier oil pastel 72 set