Pencil Anatomy: Cross-Section Diagrams of Blunt and Sharpened Leads #3487938 (License: Personal Use)

The left diagram shows a blunt pencil with a flat, unsharpened tip and layered wood casing surrounding the graphite core; the right illustrates a finely sharpened pencil with conical wood facets converging to a pointed lead. Both depict precise wood grain lines and core alignment, emphasizing structural integrity and functional design in writing instruments.

Used in educational materials on drafting tools, art supply guides, or engineering design resources; matches user intent for understanding pencil construction, manufacturing, or ergonomics.