The inker is one of the two line artists in a traditional comic book, or graphic novel. After the penciller gives a drawing (or copy of the drawing) to the inker, the inker uses black ink, usually India ink, to produce refined black outlines over the rough pencil lines. The ink may be applied with a pen or a brush, and many inkers use both. The inker is usually responsible for every black line on the page, except for letters, which are handled by a letterer.