There are different ways of doing monotype prints. This technique is called a direct line monotype. You ink up a plate, usually perspex or glass, with a very thin layer of litho / relief printing ink. Then you gently lay a piece of good quality paper, not too thick, onto it and carefully draw onto the paper with a sharp pencil. Peel the paper off the plate and there’s a monotype. Artist Tracey Emin does this a lot. I like to do it when I’m doing life drawings. A sharp pencil will give a good line and you can use your thumb or finger to press on a bit of tone and texture. There is a characteristic smudginess and softness with this technique.