Luminance 6901 Coloured Pencils from Caran D’Ache combine the highest lightfastness with the smoothness of a permanent lead. As the result of over two years of research, the colours have been formulated from pigments selected for their purity, intensity and resistance to UV. These exceptionally vibrant range of coloured pencils comply with the highest international standard of lightfastness ASTM D6901, which means artworks created with the Luminance 6901 pencils will exhibit no appreciable colour change after being exposed to the appropriate equivalence of 100 years of indoor museum lighting. Each pencil a smooth permanent 3.8 mm wax lead for clean and accurate lines which allows maximum covering power and high pigment concentration for intense, bright colours. This Portrait set includes carefully selected warm and cold flesh tones and light and dark shading. This set is perfect for creating realistic portraits of both people and animals.