different widths for different pencil thicknesses and a short point sharpener as well as the standard length sharpener. Cass Art, Cass Art London and the Cass Art logo are trade marks and trade names of Art-Line Limited. The 2 DERWENT COLOURSOFT pencils above were sharpened to a long point so I could use the full length of the 'lead' to create smooth, tonal backgrounds.

Got a chance to test it out and it works like a dream (you wouldn’t guess it was nearly half a century old). The most basic sharpeners are used over a waste bin, but for a little more money you get the canister sharpeners that hold their own waste until you're ready to empty them. X2 provides stretch, flammability and abrasion performance in an unobstrusive background grey mélange effect.This is a Derwent Graphic pencil (7B) with damage clearly seen on the barrel of the pencil at the top end rather than near the lead point.

This heavyweight desk sharpener is robust enough for the office or school but also perfect for home use. It has a sharply styled architectural look with clean lines forming a structured geometric grid pattern reminiscent of a downtown urban cityscape. I work with CARAN DACHE LUMINANCE most of the time but also use DERWENT COLOURSOFT for tonal backgrounds as these are softer than the Luminance range.The Kum extra long pencil sharpener also has 2 mini sharpeners at the top for mechanical pencils, I suspect these offer 2 different tip lengths too which is an additional bonus.