Artist graphite is a mixture of powdered graphite and clay. A harder graphite stick contains more clay. The designation "2B" represents a hard stick, while "6B" represents a softer stick. According to the website True Art Information, graphite has an advantage over traditional charcoal, as it is less dusty and adheres to drawing surfaces better.
Paint sticks come in a variety of shades and colors. They are formulated with refined pigment and linseed oil, do not emit odors and become smudge-proof within 72 hours. Paints sticks work well on fine detail and may be used in conjunction with other artist materials.
Digital pens work with your existing desktop or laptop computer, and are used to create images on a tablet which are displayed on the screen. According to art supplies manufacturer Wacom, most pen and tablet sets come with free graphic software.