When was the pencil invented?

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, switched to clay as a reinforcing agent, making the refill stronger and more wear-resistant than before, and this method is suitable for any graphite mine and is still in use today. 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.