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Chapter 16. Controlling Image Output > Preparing an Image for the Press

Preparing an Image for the Press

Images saved for press are in another world. For example, images displayed on a monitor use the RGB (additive) color space, while images sent to press use the CMYK (subtractive) color space. The format of choice is the DCS (Digital Color Separation) format. The DCS format is a version of the standard EPS format that lets you save color separations of CMYK images. DCS comes in two flavors, DCS 1.0 and DCS 2.0. Both create five separate files: one each for the four color plates, Cyan, Magenta, Yellow, and Black, and one for a combined, or composite image. However, the DCS 2.0 format allows you to save alpha and spot–color channels, as well as giving you the option of saving the five separate files under one combined file name. You can also use DCS 2.0 format to export images containing spot channels. It's important to understand that the only device that can print a DCS file is a PostScript printer. As with anything related to press operations, always contact your friendly press operator and ask what format to use.


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