200 years later, the British scientists found that this substance does not cause, but a kind of carbon. Today, many people still use misleading. Perhaps, if it is directed, not with a pencil, to avoid poisoning.

The new substance is called as graphite, from the Greek word Grapho does it mean to "write". Because graphite is a useful sign something, people began to use graphite in art and writing. They found that the graphite will mark their hands wrapped in string or sheepskin graphite. These tools are known as pencil, from the Latin word "pencillus", meaning "tail" means.

As Pencil lead, different types and styles, but they have a wider range. Recording 9B, 8B, 7B, and 6B, 5B, 4B, 3B,. 2B, B, HB, F, H, 2H, 3H, 4H, 5H, 6H, 7H, 8H, 9H. Pencil made with more clay to produce a harder pencil, but softer less clay production. The harder the pencil, lighter, softer, darker. The B refers soft, H hard.

You have not thought about the history of the pencil, because we know that you sketch? First pencil and put into use in 1560. These pencils, low-grade, easily disintegrate. Hollow shell, they want to keep the core, and then slipped into a thin core. This process must be increased, because it is a slow and inefficient process.

A failed attempt, a good pencil by Faber. German family with powdered graphite, pencil rough unqualified.

Until 1795, Nicolas Jacques Conte (NJ Child Care), a French officer, was the first really successful pencil. This is a very similar way to a pencil to make today. The core of graphite powder, and is mixed with clay, and then poured in a thin stick. The final step is for the core, baked "dough" in the oven.