This pencil, used in Project Pack No.13, is now available separately. This all-surface, water soluble graphite pencil performs and looks like traditional graphite in its dry state. If you run a wet brush over the pencil lines, they completely dissolve, and you can brush the liquid graphite throughout your design like paint. Create bold, dark marks or several tonal values with the stroke of a brush. Water adheres the graphite to your paper so you can add color over it and your color stays pure.