What are the categories of commonly used drawing pencils?

Pencils are a type of pen used for writing and sketching. They have a history of more than 400 years. Among them, pencils for drawing are divided into many types: 2B pencils, charcoal pencils, colored pencils, etc. Let's take a look at their differences today.
The most commonly used pencils are HB type. Primary school students and kindergarten children generally buy HB pencils because they are moderately soft and hard, and the color is also suitable. When you first start learning to draw, prepare a few commonly used ones, such as: HB, 2B, 4B, 6B, 8B, 12B soft pencils use the letter B, and ordinary hardness uses HB (indicating moderate hardness). Among these pencils, HB and 4B can be used as a dividing line. The ones with H are harder, 2B and 4B are neutral, and they become softer and softer after 6B.

Coloring of different types of pencils:
● 2H~2B is suitable for plaster sketches
● 6H~2H is suitable for plaster in-depth or hard objects in still life
● 2B~6B is suitable for scenery and portrait sketches
● 6B~8B is suitable for technical sketches and some portrait processing