'I turn to etching and lithography with a sense of exuberance and relief. In printmaking you can give your imagination full range and see the results almost immediately'
- Paula Rego
Lithography is a chemical process based on the fact that water and grease repel each other. Traditionally the design is drawn with a greasy crayon onto a lithographic stone, hence the name, from the Greek lithos meaning stone. The stone is dampened with water, which is repelled by the crayon. It is then inked with a grease-based ink, which is repelled by the water and adheres only to the areas covered by the grease crayon. A sheet of paper is placed on top of it and the two are passed through the press together, so that the design transfers directly onto the paper.