I just finished another pen sketch of two not-so-new characters on my sketchpad. Everything's so good I can't even help myself look back on those I've done and admire the handiwork. After constructing the initial pencil sketches I do the outlines and finish it with a black ballpen. I learned the use of this wonderfful pen from a classmate of mine from college. He does these incedibly photorealistic sketches using pencils, markers, and pens. I like using this particular brand of ballpen since it never blots and you can use it to achieve different shades of grey like a pencil except it's permanent.