Giaconda Negro is a sketch spot with pressed charcoal. The pencil provides blacker and smoother lines than a normal pencil or charcoal pencil. It has a medium hardness (no. 2) compared to Negro No. 1 and No. 3. The pencil is made of deep black chalk and has a length of 175 mm and a diameter of 4.2 mm. It has a black lacquered wooden rough.