Aquatone is a solid stick of watersoluble colour pigment in an easy to peel paper wrap. It has four times more useable material than a standard watercolour pencil. This versatile tool can be used in so many ways to create stunningly different drawing & paint effects. Use it wet or dry as a conventional pencil, as a block of solid colour or break it into convenient, easy to handle chunks. Aquatone can be used with Derwent Watercolour pencils or other non-soluble Derwent media to add depth & interest. This set of 12 pencils comes in a sturdy metal storage tin.