Artist Line - Mars Lumograph Colour Watercolor 12 Colors. The expressive color artist in the Mars Lumograph series is fully water-soluble and offers a smooth, vibrant application. After blending with water, there are no residues left, resulting in seamless transitions. The highly pigmented leads provide exceptional lightfastness and intense, vivid colors. The pencils are designed for both dry and wet techniques and are available in 120 finely tuned, consistent shades that offer unlimited mixing possibilities and endless color variations. Hexagonal, highly pigmented, fully water-soluble, lead diameter 3.6 mm, smooth application, intense colors.