Lithography was the first fundamentally new printing technology since the invention of relief printing in the fifteenth century. It is a mechanical planographic process in which the printing and non-printing areas of the plate are all at the same level, as opposed to intaglio and relief processes in which the design is cut into the printing block.
Lithography is based on the chemical repellence of oil and water.
Designs are drawn or painted with greasy ink or crayons on specially prepared limestone. The stone is moistened with water, which the stone accepts in areas not covered by the crayon. An oily ink, applied with a roller, adheres only to the drawing and is repelled by the wet parts of the stone. The print is then made by pressing paper against the inked drawing. Lithography was invented by Alois Senefelder in Germany in 1798 and, within twenty years, appeared in England and the United States.