Lightfastness is especially important when using pastels, since h
9), and the lightfastness rating.3), or a tint (.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 (. They are made from the best quality, finely ground pure pigments in an extra-fine Kaolin clay binder.