▎ 摘　　要

NOVELTY - A pencil lead contains graphite and graphene nano ribbon contacting with ab surface of graphite. USE - Pencil lead for mechanical pencil and wood component. ADVANTAGE - The pencil lead has excellent strength, deep vivid color and smooth writing feeling. The generation of scratch is prevented. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for manufacture of pencil lead, which involves dispersing graphene nano ribbon in a liquid (L) having viscosity of 7-200 mm2/second at 25 degrees C and refractive index of 1.3-1.5, and impregnating into pencil lead material formed using graphite.