Other Printing Methods
As I have said, this book is primarily concerned with sheet-fed offset litho, but graphic designers may also be asked to work with one of the other industrial printing mediums. Here is a brief description of the four most common of them.
Web offset litho
Web offset litho relies on the same kind of process used by sheet-fed offset litho with one notable difference: instead of printing sheets, it prints a continuous roll, or web. It is therefore capable of incredible speed and commonly prints both sides of the sheet in the same pass, a process called perfecting.
Web machines can be frightening not only in terms of size and noise level—some are as tall as a two- or three-story building and sound like an express train—but also ...