if you want to create a subtle blend of colours then the Derwent Blender is the ideal accessory. The Blender pencil is a soft colourless pencil made from the binder used for coloured pencils. Is allows you to blend two or more colour. At the same time it physically mixes and smoothes the colours so individual strokes and hard edges are softened. Available individually or in a blister containing 2 of each of the blender and burnisher plus an eraser and sharpener.