In 1949 Sennelier started developing a range of artists' quality pastels for the famous artist Pablo Picasso. Picasso was looking for a pastel with intense colour that could be applied directly and freely to a wide variety of surfaces. As a result Sennelier created an oil pastel with a soft creamy quality with all the intensity and vibrancy of conventional oil colours. However unlike oil colours Sennelier oil pastels are made using a unique combination of non-agressive oils and waxes so that they can be used on almost any surface including paper without cracking or affecting the substrate. The pigments are ground with an inert non-siccative binding medium that does not oxidise and that has no effect upon either film stability or surface. This base is then mixed with wax (neutral pH). All colours in the range are 100% lightfast making the Sennelier oil pastel range probably the only true artists' quality oil pastel in the world. Colours: 125 Iridescent White 123 Transparent Blue 135 Reddish Brown Gold 134 Red Gold 113 Rich Pale Gold 112 Pale Gold 111 Aluminium 132 Golden Pearl 115 Red Copper 114 Rich Gold 23 Black and 1 White. Colours subject to change.