PENCIL LEAD AND METHOD FOR PRODUCING SAME

摘要

In order to provide a pencil lead suited to pencil leads for mechanical pencils, pencil leads for wood case pencils and the like which has high strength and smooth writing feeling and which provides drawn lines with a deep and vivid black color, a pencil lead containing flake graphite which has an ab face having a flatness of at least 2 µm or less and in which an aspect ratio of an a axis or a b axis in the ab face to a c axis is 5 or more is provided with a structure in which nanoparticles having a mv value of 0.05 to 2 based on 100 of a volume average diameter (mv value) of the graphite and having a sphericity of 0.1 to 20 nm or nanoparticles having a mv value of 0.05 to 2 based on 100 of a volume average diameter (mv value) of the graphite and having a specific surface area of 200 to 600 m 2 /g are brought into contact with the ab face of the graphite or a structure in which they are adhered to the ab face of the graphite.