What is Lithography?

Lithography is a method of printing that applies ink to areas of the printed material by relying on a film of water covering regions of the image that will not show printed color at the same time that a film of ink covers regions of the image that will show printed color. The oily ink and the water film each persist in separate regions of the same printing plate because surface tensions of the two liquid types discourage them from mixing. Because this method of printing has proved capable of quickly reproducing images with many small, fine details, it has traditionally been preferred for images that include many fine details or small color elements.