The Caran d'Ache Luminance 6901 colour pencil is a combination of the highest lightfastness and the smoothness of a permanent lead. Every shade has been formulated using finely-ground pigments chosen for their purity, intensity and resistance to UV. Colours can be blended and burnished, layered on a variety of surfaces. The casing is made of California Cedar from managed forests. The smoothness of the Luminance 6901 leads require the use of a well-sharpened pencil sharpener. 001 White.