Sennelier Oil Pastels are made by Sennelier, a French art supply maker. The pigments are mixed with wax and a binder that never dries hard. They go on smooth and creamy, and their high pigment content gives deep colors that cover the color underneath well. They were first developed in 1949 for the painter Pablo Picasso.
The range has 120 colors. Each color is sold individually. Sets come in 6, 12, 24 and 48 colors, and there are wooden boxes of 50 and 120 colors.
The pastels stay soft after drawing, so the maker offers a special fixative spray.