But unfortunately, I also like the combination of carbon and lead, so I can tell you something about my experience.
The combination of carbon and lead must start with a carbon pen. In fact, most of the time I start with a carbon rod and then paint a large piece of color.
Then use charcoal to describe the details, and finally use a pencil (mostly the bright part) when going deep.
Remind you not to use too many pencils, just use them in fine parts, and don't impose them on the traces of charcoal pens.
And to be honest, many times now I think pencils can be used, but only charcoal pens can be used for in-depth study.
It is suggested that it is best not to combine carbon and lead in the exam.
Although the effect is quick and good, Spray Fixative can't be used (not at that time)
And even if Spray Fixative is used, it is easy to get dirty in the process of transporting and distributing test papers.
So it is not recommended.
Finally, Guangmei's requirements are unclear because I have finished the exam for a long time. . .