The new Derwent Onyx pencil is made from smooth dark graphite and allows you to instantly create dense rich jet-black tones, even darker than a Graphic 9B. Its 4mm wide core has a non-crumbly texture which means it will sharpen and hold a fine point for longer, making it ideal for hatching. And it will smudge allowing you to blend it with your finger tip or a tortillon.
The Derwent Onyx pencil is equally good for quick expressive sketches as well as detailed technical and architectural drawings. If you require really deep tones these can be built up by applying increased pressure. Less pressure will achieve lighter tones ideal for more precise work.
Derwent Onyx is available in two tones, Medium and Dark. This set contains two of each tone, plus an eraser and a sharpener.