Derwent runs as two ranges, and it helps to know which one a job needs. Derwent Academy covers the everyday classroom items: pencils, paint pens, sharpeners and visual art diaries, some packed in tens for a class. The artist ranges are sold one colour at a time in boxes of 6 as well as in tins, so a shade that runs out can be replaced without buying a whole new set. Inktense pencils dissolve in water like a watercolour and are permanent once dry. Lightfast pencils are made to comply with ASTM D6901, which matters for work that will hang in daylight. See Derwent Academy, Inktense pencils, Lightfast pencils and watercolour pencils.
