Half tone
There are two common definitions for the term halftone, as far as prepress and printing is concerned;
1. Traditionally, a halftone screen is a piece of film with a grid of lines (line screen). It is used to break down continuous tone images, such as photographs, into half-tone images for printing. The halftone screen breaks down the image into a symetrically aligned series of dots - known as halftone dots. Nowadays, this process is generally done digitally, via an imagesetter.
2. A continuous tone image that has been commercially printed, using the halftone process, is also referred to as a halftone imge.
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Site Updated February 2010