Rembrandt Pastels are the world's most popular soft pastel, possessing unsurpassed glow, purity, and intensity. They are 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. Rembrandt Pastels contain no hard bits or sharp edges which could cause shiny spots or scratches during application. Rembrandt Pastels are hand-checked throughout production to ensure artists the consistency in texture, color, and working qualities that they've come to depend on.Each round Rembrandt Pastel stick has a transparent label printed with information valuable to the artist: 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. Lightfastness is especially important when using pastels, since hey're practically pure pigment and very susceptible to light. About 70 percent of the Rembrandt Pastel line has the highest possible degree of lightfastness. These soft round pastels are sold individually.