So, why do we call the core of a pencil "lead"? Graphite was initially thought to be a type of lead when it was discovered. Today's pencils are made of graphite and clay, a combination first introduced by Conté in 1795.
So, why do we call the core of a pencil "lead"? Graphite was initially thought to be a type of lead when it was discovered. Today's pencils are made of graphite and clay, a combination first introduced by Conté in 1795.