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In 1662, the world's first pencil factory, the Sterling Pencil Factory, was built in Nuremberg, Germany. Later, the German F. Custer created the Faber·Castel Graphite Pencil Factory in Nuremberg, using sulfur, antimony, etc. as a binder to heat the graphite to produce a lead core, making the graphite pencil rod manufacturing technology a big step forward. step. For the first time, N.J. Kant of France used the method of washing graphite to improve the purity of graphite and cement the graphite into a refill. This method is called Kant method. It laid the foundation for the pencil industry. Later, the French chemist Comte repeatedly tried to use clay as a reinforcing agent, and the refills were more durable than the original, and this method was applicable to any graphite ore until 2018. There is a carpenter named William Monroe in the United States. In the grooved wooden strip, a black lead core is embedded, and the two wooden strips are glued together to make the world's first pencil. Rod.