The Lead In Your Pencil: A History of Pencil Hardnesses

by Keith Pepperell

Nobody has ever purchased a pencil, they just get them from work. From humble beginnings in the 16th century pencil manufacture has now reached several billion a year. Most pencils are yellow and you no longer go mad if you chew their yellow paint. This little volume looks at the lead in your pencil.

• Format: Paperback
• Language: English
• ISBN: 1508498253
• ISBN13: 9781508498254
• Release Date: February 2015
• Publisher: Createspace Independent Publishing Platform
• Length: 38 Pages
• Weight: 0.14 lbs.
• Dimensions: 0.1" x 6.0" x 9.0"