Within each H and B category, pencils are assigned numbers on a scale to denote their hardness or softness. The HB pencil sits at the center, providing a balanced mixture. In the H category, moving to the left from HB leads to lighter pencils, with designations such as 2H, 3H, up to 6H. Conversely, in the B category, moving to the right from HB results in darker pencils, including 2B, 3B, up to as high as 12B. The numbered scale helps artists choose the right pencil for their desired line intensity.
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