Planographic printing

Printing from a flat surface, as opposed to a raised surface

Planographic printing means printing from a flat surface, as opposed to a raised surface or incised surface. Lithography and offset lithography are planographic processes that rely on the property that water will not mix with oil. The image is created by applying a tusche to a plate or stone. The term lithography comes from litho, for stone, and -graph to draw. Certain parts of the semi-absorbent surface being printed on can be made receptive to ink while others reject it.

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