Today light sensitive digital plates are used to record photographic images. These images are then down loaded from the camera into a computer for processing. Offset printing is a form of transfer printing. A rubber roller used in transferring the image from a printing plate to paper. Off set printing is an advanced form of lithography printing.
Planographic printing is done from an even or level plane.
Lithography is a planographic printing process. See intaglio printing , stencil printing and relief printing . The earliest form of printing is probably relief , followed by either stencil , or intaglio . There is planographic printing and transfer . With the arrival of the PC came digital printing .