Lithograghy printing is a commonly used printing technique. An inked image is transferred from a plate 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, this technique employs a flat image carrier on which the image to be printed obtains ink from ink rollers, while the non-printing area attracts a water-based film (called “fountain solution”), keeping the non-printing areas ink free.
Lithograghy Printing – Flat Sheet
Printing is carried out on single sheets as they are fed to the press one at a time. Sheet-fed presses use mechanical registration to relate each sheet to one another. This ensure that they are reproduced with the same imagery in the same position on every sheet.
Lithograghy Printing – Web
A high run speed printing press that uses rolls of paper rather than individual sheets. Web offset presses are beneficial in the long run as printing jobs, typically the press runs that they exceed ten or twenty thousand impressions. In addition to the benefits of speed and possible faster tun around times, some web presses have the inline ability to print, but also cut, perforate and fold.