Sennelier Oil Pastels were born out of the needs of Picasso, who wanted to paint without a brush and experiment on a variety of surfaces. These pastels do all of that and more. Sennelier pastels have more pigment than any other brand, are lightfast, and thin with turpentine. This ultimate Oil Pastel Set has the complete 120 colors of the line. Picasso himself picked the first 48, metallics and irredescents were added in the 1980"s. WARNING: This product contains a chemical known to the state of California to cause cancer.