The ink goes onto the areas that have been marked by grease. These repel water and thereby attract the ink. The paper is then passed though the press. The paper picks up the ink from the plate. The process is then repeated.
Some printings have a fixed quantity.
Each printing is signed by the artist. Signed artworks can increase in value. Each color requires a different screen. An artist draws onto a plate using grease pencils or paint. The plate may be stone, mylar, alumninum or even paper.