Mont Marte Oil Pastels are rich coloured drawing materials which have a soft buttery texture. They are excellent for colour blending and can be used on a wide variety of toned and textured surfaces. Oil pastels are great for making interesting designs and patterns by scratching into built up layers with a sharp tool, a technique called 'sgraffito'. They can be tinted with oil mediums or turps to create glazes. 12 High Quality Pigments. Non toxic.