1662, the world's first pencil factory-Shidelou pencil factory was built in Nuremberg, Germany. Later, F. Kaster, a German, founded Faber Kaster Graphite Pencil Factory in Nuremberg. The lead core was made by heating with sulfur, antimony and other binders and mixing with graphite, which made the manufacturing technology of graphite pencil rod take a big step forward.

N·J· Kant of France used the method of washing graphite for the first time to improve the purity of graphite, and bonded graphite with clay to make a refill. This method is called Kong Defa. It laid the foundation of pencil industry.

Later, after repeated experiments, Comte, a French chemist, changed to clay as a reinforcing agent, and the prepared refill was more solid and wear-resistant. Moreover, this method was suitable for any graphite mine and has been used for 20 19 years. William Monroe, an American carpenter, embedded a black lead into a wooden strip with a groove, and then spliced the two wooden strips together to make the world's first pencil rod.

Extended data

Pencils are always blunt, so they must be sharpened. In the17th century, people just sharpened pencils with knives. With the progress of society, by the beginning of19th century, people not only need to use more pencils, but also have higher requirements for the time spent sharpening pencils. The automatic pencil sharpener was born in this environment.

The first such pencil sharpener in the world was invented by a Frenchman in 1828. In the next few centuries, the pencil sharpener gradually developed into a familiar appearance for adults. The golden age of pencil sharpener was probably from the mid-1980s to the early 1990s, when automatic or electric pencil sharpeners appeared. The traditional pencil sharpener slowly withdrew from the historical stage.

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