What is the heart of a pencil made of and how is it made?
The core of a pencil is made of graphite. Graphite is written as black lead, but it is actually not lead but a member of charcoal.
This graphite is pure black and can be easily ground into powder. This makes it very useful for making pencil lead. In addition, graphite can be extracted from the soil or produced in large quantities in factories. In other words, it is cheap and can be mass-produced.
In the old days, people used graphite extracted from the earth and put it directly between boards. This was the first pencil, and later, a new method of making lead was invented, which became the pencil we use today.
First, graphite was ground into a powder, then mixed with clay and baked to form a new type of lead. This process produces either soft and stiff shins or hard and light shins, depending on the ratio of graphite to clay.
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As the pencil is written "pencil (namari no fude)" in Chinese characters, people used to write characters and draw pictures with lead and silver.
