In terms of material, the brush head is made of animal hair. The soft-tip pen is made of plastic and cannot be disassembled.
There is a scientific brush in Japan. The nib is nylon, and there is an ink storage bag in the pen tube, which is also made of special ink.
But this so-called scientific brush can't be compared with the traditional brush.
The elasticity of nylon is constant, and the elasticity of hair is layered.
Nylon has poor water absorption, while animal hair has relatively strong water absorption.
Special ink only ensures that the pen does not coagulate, which does not reflect the effect of five-color ink.