A printing process where a film negative is made from your file or artwork. This negative is used to make a printing plate with the image of your design on it. This is the most common form of commercial printing.
Some printing presses are sheet fed, meaning that they print single sheets of paper very rapidly.
Other presses are web fed, which means that they are fed from a roll of paper which is usually cut into individual sheets after printing. There are advantages to each form of printing. There is a greater variety of papers commonly available in sheets as opposed to rolls. Web presses run faster than sheet-fed presses but they generally are more tedious to set up. This makes them more economical for long runs than for short runs.