A plate of metal/perspex is scratched into using a metal tool. It is then inked up and wiped until the desired effect is achieved before printing onto soaked paper using a press.
A detailed drawing is scanned and 'burned' onto a screen through which ink is pushed onto paper.
Cyanotype is an early form of photographic printing. These are also known as 'blueprints' due to the Prussian Blue that is produced in a chemical reaction to light. A detailed drawing/painting is worked up onto a transparent sheet which is placed on top of a sheet of paper painted with light-sensitive chemicals. The sheets are then exposed using sunlight and washed in water.