Editing Printing (section)

===Offset===
{{Main|Offset press}}
[[File:The 910 ton printing presses at the Las Vegas Review-Journal were the largest in the world when installed in 2000.webm|thumb|The 910-ton printing presses at the [[Las Vegas Review-Journal]] were the largest in the world when installed in 2000]]
Offset printing is a widely used modern printing process. This technology is best described as when a positive (right-reading) image on a printing plate is inked and transferred (or "offset") from the plate to a rubber blanket. The blanket image becomes a mirror image of the plate image. An offset transfer moves the image to a printing substrate (typically paper), making the image right-reading again. Offset printing uses a lithographic process which is based on the repulsion of oil and water. The offset process employs a flat (planographic) image carrier (plate) which is mounted on a press cylinder. The image to be printed obtains [[ink]] from ink rollers, while the non-printing area attracts an (acidic) film of water, keeping the non-image areas ink-free. Most offset presses use three cylinders: Plate, blanket, impression. Currently, most books and newspapers are printed using offset lithography.