No.2 pencils are widely used, but you may not know what the number actually refers to. This video explains how pencils developed into their modern form and the significance of the labeled numbers.

More clay in the mixture makes the lead harder. A harder lead has a higher number. Pencils are numbered from 1-3 but most people use a number 2. Harder lead makes a lighter mark and softer lead makes ...

National Museum of American History pencil, packaged set National Museum of American History Box of American Lead Pencil Co. Venus Pencils National Museum of American History Wallace Pencil Company ...