Caran D'Ache has drawn on its expertise and explored the deepest graphite mines to search out the infinite colour nuances of carbon. The result is the Graphite Line, an original concept dedicated to graphite that gives artists the opportunity to compose their own graphite range and explore all the shades of black. An integral component of the line is the Grafstone pencil. With no wood encasing the Grafstone pencil is all pure graphite lead in a pencil form.

The Grafstone pure graphite pencil is available in three gradations: HB, 3B, and 6B.