Final answer:
When tracing over a drawing for a graphite transfer, the material that transfers onto the blank paper is graphite from the original drawing.
Step-by-step explanation:
When you trace over your drawing in a graphite transfer process, the material that transfers onto the blank paper is graphite. Graphite is a form of carbon and is commonly found in pencils, ranging from hard qualities (H, HB) that leave lighter, grayer lines to soft qualities (B) that can leave very dark marks. The softer the graphite, the more pigment (graphite) will transfer due to a higher concentration of graphite and a lower concentration of clay binder in the pencil. The layers of carbon atoms in graphite have weak attractions between them, which allows the graphite to easily transfer onto another surface under the pressure of tracing.