There are different grades of drawing pencils that range in hardness and softness.
Hardness: The "H" that you see on a pencil stands for the hardness of the graphite.
Blackness: The B stands for darkness of the graphite of a pencil
2 HB: This type of pencil is the most common among schools and most people have come in contact with this type. This pencil has medium softness and hardness.
Pencils range from 9H to 9B. 9H has an extremely hard graphite to 9B which is the extremely soft graphite.
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