A Sketchy History Of Pencil Lead...
When we say pencil lead, we mean graphite , because that’s what a pencil has inside. I... ...ncil has inside. In this video, we find out where graphite comes from and how it gets into the middle of a p... ...e part they left out. Whose idea was it to encase graphite in w...
https://www.neatorama.com/2016/10/15/A-Sketchy-History-Of-Pencil-Lead/
