Then along the baluodaier Mark Shepherd of common graphite in the sheep's paintings. Inspired by this, people will cut into small graphite block, used to write painting. Before long, King George II baluodaier graphite ore collection to the Royal family all, put it down for the Royal patents. Graphite article writing which will both get hands dirty, and easy to break. In 1761, Germany chemists, Farber first solved the problem. He wash graphite, graphite graphite powder and then mixed with sulfur, antimony, Rosin, and this mixture into, which is much larger than the toughness of pure graphite, is not easy to get hands dirty. This was the earliest Mechanical Pencils.

Distribution

Until the late 18th century, only English and German in the world to produce such a pencil. Thus, Napoleon · Bonaparte launched on neighbouring countries after the war, the British and Germany cut off France's supply of pencils, so Napoleon · Bonaparte ordered France chemist Auguste Comte in the graphite mine is found on their own land, and then make a pencil. But France graphite ores of poor quality, and less reserves, Comte in graphite mixed with clay, into the kiln barbeque, made well, and durable in the world at the time of the pencil.

Batching scale

Graphite mixed in different proportions of clay, produced a pencil lead hardness is different, and the color depth is different. This is what we see today on the pencil mark h (hard pencil), b (soft pencil), HB (with moderate softness pencil) origin. Its hardness higher, less the graphite content. Pencil set of rods coat is mandated United States craftsman Monroe to complete. He fashioned a machinery that can cut out of wood and wood engraved grooves, place the pencil in the chute, then two pieces of wood for good, bonding, core was firmly embedded in the Middle, this is what we use today's Mechanical Pencils.

Use

Pencil of love

Raising paint pens made of clay and graphite-core for written media, for learning, Office, engineering drawing, art, painting, writing or painting tools such as mark. In ancient Greece and Rome had made similar useful lead metal pencil lead rods. This Pen made of tapered, friction and use of lead and other objects leave traces of lead, to underline mark. In 14th century, Europe appears similar to the modern pencil, Netherlands painters to paint on the paper. Italy has been the use of lead and lead-Tin made from a mixture of rod, for painting and writing. 1565 in German c. diagram of Gesner's collection of useful on a pencil drawing, and recorded "drawings and notes, people made with mixtures of lead and other core, and then attach a wooden handle, sth to underline" text. The same year United Kingdom with graphite-core starting hand-made the original wooden pencil. 1662 in Germany Nuremberg into the world's first pencil factory-Mr John e Strickland floor Mechanical Pencils factory.

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