Discuss the three major processes of Printing.

There are a wide variety of technologies that are used to print stuff. The main industrial printing processes are:

Offset lithography

Flexography

Digital printing: inkjet & xerography

Gravure

Screen printing

Additional printing techniques were developed for very specific applications. These include flock printing, letterpress, intaglio, pad printing, and thermography.

Offset

In offset lithography a printing plate, which is most often made from aluminum, contains an image of the content that needs to be printed. When the plate is inked, only this image part holds ink. That inked image is subsequently transferred (or offset) from the plate to a rubber blanket and then to the printing surface. The process can be used to print on paper, cardboard, plastic or other materials, but these have to have a flat surface.

Below is a picture of a 4 color sheetfed printing press. At the far end is the intake where individual sheets of paper are automatically fed into the press. The 4 towers or printing units each print one color, typically black get printed first, followed by cyan, magenta and yellow. The stack of printed sheets is visible on the front of the machine, underneath the press console & monitor which the press operator uses to control the press. For higher volume work offset presses use rolls of paper. The picture below shows such a much larger web press. It ________ ________ _____ _______ ____ _____ _____ ______.
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