Then, drafting an editorial cartoon was largely done by hand. Today, Lowe uses a mix of old-school techniques — pen, ink and paper — and 21st-century tools like Photoshop. "I'm a dinosaur. But I have ...

In a nutshell, it's an art pen that changes color tone as you draw – for example, a green Chameleon Pen's ink progressively goes from light green to dark green as the ink is applied to the paper.