Rigid colored pencils and soft colored pencils The pen core of a colored pencil is made of a waxy agent (medium) fixed in the shape of a pen core by a pigment-containing dye, and the more the media content, the harder the core.
A hard colored pencil is used for drawing, and the refill is not easy to break even if it is cut long and sharpened, and if the soft pencil is cut too long, there is a danger of breaking the core.
Two. Pale and dark colored pencils The pale core is harder, dark or bright, which is all because of the relationship between the media content of the pen, try to approach the White pink bar! It is immediately possible to find that it is much harder than the bright pink refill.