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Pencil History

Pencil Now the pencil does not contain lead, but made of graphite and clay, Pencil the reason why this is called, is due to its historical evolution caused.

Ancient Greece, Rome had made a lead-like pencil lead with metal lead. They are mostly conical, Pencil with other objects after leaving the traces of lead, used to mark the mark.

In the 14th century, there was a similar pencil in Europe.

In 1565, the United Kingdom began to graphite as a refill, hand-made the most original wooden pencil.

In 1662, Germany built the world's first pencil factory.

1790 ~ 1793, Pencil the French Kant used clay will be made of graphite refills, laid a modern pencil industrial base. In the pencil pen on the usually have a hardness mark, h said hard pencil, the greater the number of the front of the greater hardness: b said soft pencil, Pencil the larger the number of the front of the more soft. Hb is a soft and hard pencil, suitable for daily writing purposes.

Because lead is written on rocks or walls, there will be black traces, so in ancient Greece and Roman times people used lead as a drawing and writing instrument. Pencil In ancient China, written in silk and paper, if wrong, then lead powder modified, so there is a "pencil" in the classical, Pencil but with the modern pencil is different.

In the fifteenth century, the graphite mine was found, when people do not know the composition of graphite, said the graphite as "black lead (blacklead) .Pencil In about 1492, the British began to use graphite made of pen, known as the pencil It was not until 1779 that scientists knew that graphite was a form of carbon. "It was made of graphite and then mixed with clay and poured into two rounds of wood and made of plastic in recent years.

In order to meet the needs of pencil refills in the graphite and clay can be used in a variety of different proportions of mixing, mixing ratio is different, Pencil the nature and purpose of the refill is also different. For example, as a sketch with a need for a little soft, black point; Pencil students write the work of the need to use a little harder, the color lighter. Pencil When we buy a pencil, pay attention to the designation of the pen, where H stands for hard, F is firm, and B is bold.

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