How Many Pencils Can Be Made Out of a Factory Batch of Graphite? A batch of graphite has just been delivered to this pencil factory in Germany. Once it’s been thoroughly mixed with clay, it’s ...

It can’t have been long after the invention of the pencil that people realised they occasionally made mistakes while using it. Prior to the invention of the rubber eraser we know today ...

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.

The pencil “lead” is actually a mixture of graphite and clay. 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 ...

Student-grade colored pencils and professional-grade ones vary drastically not only in their price but how they're made. A set of 120 Faber-Castell Polychromos pencils costs $350, 14 times as much ...