The combination of black carbon and some kind of oil is darker than charcoal, which is used to deepen the shape.

This product has the characteristics of water solubility, and it has many colors to choose from, so as to bring more choice for your painting.
Feel comfortable, gentle, unique water-soluble energy, providing color and water solution to the sketch of the choice, rich sketch language.

Square pen body, with different thickness of the stroke effect, in the design field of effect picture also has rich performance techniques.