Derwent Academy hardcover sketchbooks contain 128 sheets/64 pages of 135gsm smooth, acid-free paper, proven for use with a variety of dry media. These include graphite, charcoal and coloured pencils - for colouring, sketching and drawing. The black linen hardback cover and elasticated closure protect artwork while providing a solid base for working on location. The sketchbook also has a perforated edge that makes it easier to remove the pages.