Why is the pencil called "pencil"? Why is it called pencil?

1564, the island of England was hit by a hurricane, and many trees in Cumberland were uprooted. People found a kind of black graphite under the roots of trees, which easily left black marks on objects. Because chemistry had just begun to develop, it was mistaken for lead.

Because of misunderstanding caused by history, pencils do not contain lead. In ancient Greece and Rome, lead bars similar to pencils were made of metallic lead. /kloc-in the 0/4th century, similar pencils appeared in Europe.

From 65438 to 0565, Britain began to make the most primitive wooden pencils by hand, with graphite as the refill. From 1790 to 1793, France used clay bonded graphite to make refills, which laid the foundation of modern pencil industry.

Extended data:

Generally speaking, "H" means hard pencil, "B" means soft pencil, "HB" means pencil with moderate hardness, and "F" means pencil with hardness between HB and H. ..

The arrangement (from soft to hard) includes hardness grades such as 9B, 8B, 7B, 6B, 5B, 4B, 3B, 2B, b, HB, f, h, 2H, 3H, 4H, 5H, 6H, 7H, 8H, 9H and 10H.

The larger the number before H, the harder the lead and the lighter the color. The bigger the number before B, the softer the lead and the darker the color.