Free Knowledge – What are Registration Marks?
Cross marks used on a press sheet to assure proper registration are called Registration Marks.
A printer uses Registration Marks to align the separate colours of ink when printing a page with more than one colour, Since each colour of ink used in printing is applied with a separate set of rollers to a separate printing plate, Registration Marks are crucial for accurate alignment. There are many different kinds of Registration Marks used by printers, each with its own purpose to aid in printing a variety of different types of imagery.
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