Set of 12 NeoArt 6901 Pastels100% lightfast guarantee for 100 years, in compliance with the highest international standard: ASTM D 690 Range of colors developed with a large variety of highly concentrated pigments High quality wax and oil pastels for professionals and amateurs artists requirements. 48 colors, available in assortments and individually. Pastel : water resistant colors, soft, non powdery, soluble in turpentine (spirits of turpentine). Lightfastness: compliance with