Offset printing is a widely used printing technique where the inked image is transferred (or "offset") from a plate first to a rubber blanket, then to the printing surface. When used in combination with the lithographic process, which is based on the repulsion of oil and water, the offset technique employs a flat (planographic) image carrier on which the image to be printed obtains ink from ink rollers, while the non-printing area attracts a film of water, keeping the non printing areas ink-free.

The advantages of offset printing include:
Consistent high image quality
High quality of printing at low cost.
Quick and easy production of printing plates.
Longer plate life than on direct litho presses — because there is no direct contact between the plate and the printing surface.