Besides pencil, charcoal, chalk and lead paper, what other materials can be used for sketch?

Sketch usually refers to methods that can leave traces on a plane, such as crayons, charcoal pens, pens, pencils, colored chalk, ebony brown, ink, paper and so on. Others include wear and tear caused by wet clay, ink-stained cloth, metal, stone tools, containers or cloth covers.

Sketch, broadly speaking, refers to all monochromatic paintings, which originated from the cultivation of western modeling ability.

Therefore, as long as it is monochrome and you are creative, you can create sketches. Here are some materials:

Crayons, charcoal pens, pens, pencils, colored chalk, ebony brown, ink, ballpoint pens, iodine (creative enough), cocoa beans, mung beans, red beans, rice grains, black beans, biscuits, metal objects, rust powder, flour and cloth. ...

I am an art student, and I often mess around with things. I used some materials on them. If you want to elaborate, you can ask me again. Everyone who likes art can learn from each other.