Drawing pencil numbers indicate the hardness and darkness of the graphite core. The higher the number on pencils marked with a number (like "2," "2-1/2," or "3"), the harder the graphite core, resulting in lighter marks on paper.
Drawing pencil numbers indicate the hardness and darkness of the graphite core. The higher the number on pencils marked with a number (like "2," "2-1/2," or "3"), the harder the graphite core, resulting in lighter marks on paper.