Derwent Water-Soluble Sketch Pencils LT HB, MD 4B, DK 8B are a series of water-soluble pencils that combine traditional graphite properties with the ability to achieve watercolor effects when mixed with water. The pencils, available in various hardness levels (LT HB, MD 4B, DK 8B), allow for different effects – from precise, fine lines (LT HB) to intense shading and deep tones (MD 4B, DK 8B). When water is applied, the graphite creates subtle tonal transitions, giving a watercolor-like effect, perfect for drawings, sketches, and more advanced artistic techniques. With these pencils, artists can experiment with different effects, creating unique works of art.