![]() In the middle area, you will find the designations HB and F. The 20 different degrees of hardness of pencils in Europe range from 9H for extremely hard to B9 for very soft. This can be illustrated well with an example: A pencil of hardness HB is of medium hardness in Europe, a soft pencil in Japan, and a pencil with a hard lead in the USA. ![]() There is no worldwide unified standard for pencil hardness. Pencil Hardness Chart and Their Applications Especially stenographers appreciate these advantages. If you write on it, you can quickly erase it again with an eraser. A pencil of medium hardness is best suited for writing. However, the soft lead also wears out much faster and therefore has to be sharpened often. They are primarily suitable for artistic purposes. Particularly soft pencils give you a broader, rich black line. When sharpened well, they will leave very thin grey lines, which makes them ideal for detailed sketches. ![]() Extremely hard pencil leads have less abrasion. The heat and duration of the burning process also determine the hardness of pencils. Very hard leads only have a proportion of about 20 percent, and very soft leads contain up to 90 percent graphite. The mixing ratio between graphite and clay in production determines how hard or soft the lead will be. Depending on what you want to use the pencil for, you can choose the appropriate hardness. From technical drawing to writing to artistic sketches, you have the choice between around 20 fine gradations in different degrees of hardness. Why There Are Different Pencil Hardness Grades From the 19th century until today, a mixture of graphite and clay as well as various oils or greases for impregnation has been used to manufacture the pencil leads. As the black material was then considered to be lead ore, pencils were given the name which has been used until today. So it didn’t take long before the idea was born to encase the graphite rods in wood for better handling.
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