Offset printing is the process of transferring ink to a plate and then to paper. It produces the highest quality image because of better print control and higher resolution versus other imprint methods. It also allows for resolution in producing halftone images. Art is etched onto a plate, the ink sticks to the art on the plate and is then transfered to the paper.
Digital printing eliminates the numerous steps involved in the offset printing process, such as creating films and plates for ink rollers. Most digital presses today apply ink in a single pass from a single ink head, similar to common inkjet printers found in homes and offices.