“Lithography: A planographic process that depends on the antipathy of grease to water. The design is drawn directly on a bed, traditionally of limestone, with a greasy crayon. The stone is wetted, then coated with an oily ink, which clings to the greasy design and is repelled by the wet areas.”
Excerpted from: Diamond, David G. The Bulfinch Pocket Dictionary of Art Terms. Boston: Little Brown, 1992.