Not bad, not too difficult. First of all, colored lead, as a solid pigment, feels close to a pencil and is a relatively easy-to-use tool. Colored lead on the domestic market is also cheaper. Colored lead is not the mainstream pigment, but now it is mostly used in animation design, and there is no clear standard and system. So, no pressure. The difference between him and ordinary pencils lies in the overlapping colors. However, pay attention to your choice. There are many pirated pencils on the market. Lead and zinc are hard, difficult to change color and poor in quality. ...