Pencils are one of the most commonly used writing instruments in the world. They are used for drawing, writing, and sketching. But have you ever wondered what material is used to make the lead in pencils? Many people believe that the lead used in pencils is made of lead metal. However, this is not entirely true.
The Evolution of Pencils
The first pencils were made in the 16th century and were made of graphite, a form of carbon. The graphite was wrapped in string or sheepskin to make it easier to hold. However, the name ‘pencil’ comes from the Latin word ‘penicillus’ which means ‘little tail’ and was used to describe a small brush used for writing.
It wasn’t until the 19th century that pencils started to resemble the ones we use today. The wooden pencil was invented in the 1790s by Nicolas-Jacques Conte. The wood was used to protect the graphite and make it easier to sharpen.
The Truth About Pencil "Lead"
Despite the name, the lead used in pencils is not actually made of lead. Instead, it is made of graphite powder mixed with clay. The clay helps to bind the graphite together and gives it the necessary shape.
The use of graphite in pencils was discovered in the 16th century in Cumbria, England. Graphite was found to be much softer than lead and could be used to create a dark mark on paper.
Why "Lead" is Still Used in the Name
The name ‘lead’ for the material used in pencils actually comes from the fact that lead was used for writing in ancient times. The word ‘plumbago’ was used to describe the black substance that was used for writing. This word is derived from the Latin word ‘plumbum’ which means lead.
When graphite was discovered, it was found to have similar properties to plumbago and was therefore called ‘black lead’. This name stuck and is still used today, despite the fact that there is no actual lead in pencils.
The Dangers of Lead
Lead is a toxic substance that can cause serious health problems if ingested. It can cause damage to the brain and nervous system, as well as other organs in the body. This is why lead-based paint and leaded gasoline have been banned in many countries around the world.
However, the lead used in pencils is not harmful. The graphite and clay mixture used in pencils is completely safe and non-toxic.
The Different Grades of Pencil Lead
Pencils come in different grades of lead, which are used for different purposes. The grade of the lead refers to how hard or soft it is.
The softest lead is 9B, which is used for sketching and shading. The hardest lead is 9H, which is used for technical drawing and fine details.
Conclusion
Despite the name, lead is not used in pencils. Pencils are made of a mixture of graphite and clay, which is safe and non-toxic. The name ‘lead’ comes from the use of lead in ancient times for writing. Pencils have come a long way since their invention in the 16th century, but they still remain one of the most popular writing instruments in the world today.