Most people and students in non-art colleges believe that the "HB" we used to write on school days is the only real pencil. The "HB" symbol originally expresses the size or intensity of the pen line
Starting from "6H" the least intensity, down to "8B" the highest intensity, and
This of course helps the students of art or painters in making paintings gradient shadows and degrees
The heart of the pencil is not made of lead. It is made of graphite or carbon. It is called a pencil. It is an inherited effect from ancient Rome because they used a column of lead to write on paper. Material made
The paint color of the exterior pencil is mostly not random but often indicates the manufacturer. For example, the pens produced in Germany are green in America, yellow in India, red with black in Britain, yellow with black and in Switzerland, Red and there is no Arab country that manufactures pens machines themselves