Derwent 72 Inktense Blocks Tin Set Professional Crayons SticksDescriptionSpecificationsShipping These water soluble blocks combine the versatility of Inktense pencils and the freedom of blocks, opening up an exciting world of endless possibilities Easy to blend colours, can be mixed and layered to create an infinite range of hues and tints Firm consistent texture produces minimal dusting Square shape is ideal for both fine and detail and broad, expressive strokes So versatile they can be used wet or dry, or