Cretacolor Graphite Blocks are a rectangular section, 7 x 14 x 72mm solid graphite artists block. Because of their rectangular "block" shape, they can lay down smooth, intense shades, from very fine lines (using the edges) to strokes of 6mm, 13mm and even 72mm wide in one, fast free movement. Ideal for portrait and landscape sketching. The solid graphite stick with no wood casing lasts longer than pencil-style versions and represents excellent value.
Cretacolor Nero Blocks are made from a blend of soot, clay and binding agent, plus "oil". Their stroke is extremely soft and smooth, appealing in its very rich coverage. It is not soluble, although partial wiping is possible in this extra soft (2B) grade. They leave a strong, dense mark. Coarse strokes can be achieved by using a rougher, grainy paper.