Why are pencils hexagonal?
It is comfortable to hold.
The hexagonal feels like a cylinder, it is comfortable to hold.
It is helpful for young children to develop correct pen-holding posture.
For people who have mastered the correct posture of holding a pen, the hexagonal prism makes the force of the thumb and index finger more balanced and labor-saving when writing.
For children who are learning, the hexagonal prism allows the index finger, thumb and middle finger to be placed one side apart, forming an accurate angle:
But from this point of view, Triangular pencils are more helpful for children to practice holding pens.
It is beneficial to the rotation
From the point of view of sketching, it is beneficial to the rotation of the pen.
When sketching, the painter needs to make sure that “the tip of the pencil always has edges and corners”.
When arranging the line, he needs to turn the pencil from time to time-sharpening the pen to sharpen it again.
This can save time for sharpening pencils.
If the pencil has edges and corners, it is really convenient to turn the pencil.
When painting, such a holding posture also requires the pencil itself to be more stable with edges and corners.
Anti-rolling: It doesn’t roll off easily when it’s on the table.
It has fewer edges and corners of the cross section, so it is not easy to roll off the table and fall to the ground.
From a technological point of view, the cross-section of a regular polygon or a regular circle is easy to process, while the asymmetric cross-section (including centrosymmetric and axisymmetric) is difficult to process.
Easy to pack and transport.
From the point of view of saving materials, space and easy binding, the cross section had better be cut out “continuously” by the machine.
That is, it should be polygons that can cover the entire plane. There are only three such regular polygons:
Of course, for artists and carpenters, they often use pencils in uneven environments.
Their drawing board will tilt, and the carpentry site is mixed with all kinds of personnel.
At this point we will focus on the “anti-rolling” ability, you can choose the other shapes :
If we don’t have to think too much about the cost, but want it to be able to flexibly adjust the thickness of the strokes according to our needs.
Then we have another option to strike a balance between “roll resistance” and “pen holding comfort”: