Derwent Academy Visual Art Diary Sketch Book, FSC Certified Acid Free 120 Pages (A5 Portrait) Derwent Academy Visual Art Diaries are ideal for colouring, sketching and drawing. Made from Derwent quality 100gsm acid free cartridge paper, this Visual Art Diary has 120 pages, durable double wire spiral spine and finished with a heavy duty polypropylene cover. Available in a range of orientation and sizes.