Unsurpassed glow purity and intensity! Made from the best quality finely ground pure pigments in an extra-fine Kaolin clay binder. The result is a velvety-smooth softness in every color. Each rich color is thoroughly blended and uniform end to end. Contein no hard bits or sharp edges which could cause shiny spots or scratches during application. Handchecked throughout production to ensure artists the consistency in texture color and working qualities on which they?ve come to depend. Each round pastel stick has a transparent label printed with information indicating the color name and number the number suffix indicating whether it is a pure tone (.5) a shade (.3) or a tint (.7 .8 .9); and the lightfastness rating. About 70% of this pastel line has the highest possible degree of lightfastness (+++).