You will need: a pencil, clear sticky tape and two pieces of paper.
1, Using the pencil lay as much graphite onto a clean piece of paper. A HB pencil should be fine.
2 Rub your finger into the graphite, insuring you cover the whole of the fingertip
3, Take a piece of sticky tape and stick it over the tip of the finger.
4, Stick the piece of tape onto a clean piece of paper along with your details.