Lyra Graphite Crayon, Water-Soluble, 6B. Turn your sketch into masterpiece with Lyra Graphite. This water-soluble graphite crayon is ideal for sketching, layout work, shading large areas and creating stunning watercolor effects. Use as is or with a brush and water for monochromatic watercolor-like drawings. The graphite is non-staining and erasable when dry, allowing you to erase back into "paintings." The hexagon shape is comfortable to hold and will not roll off of surfaces.