Xerox P8EX Spire CXP8000 Color Server - User Guide - Page 349

Default Color Flow 335 The CMYK workflow is used to emulate various standards used in lithographic printing. These standards represent specific combinations of paper and ink, as well as popular proofing systems. It is also used to emulate other printing devices such as offset presses, or other digital printers. An example of a CMYK workflow job would be printing a test sample for a survey before moving to an offset press to print millions of survey forms. In such a case, it is best to emulate the offset before the job actually goes to offset printing. Note: RGB colors are not affected by the CMYK workflow. The Spire CXP8000 color server supports two CMYK emulation methods, Device Link (default) and CSA. If you would like to use the CSA method, select Tools>Settings>Color and change the emulation method. For more information about choosing an emulation method, see Emulations on page 414. The CMYK workflow parameter is also used to specify the required rendering intent for CMYK elements. All printers, monitors, and scanners have a gamut or range of colors that they can output (or view in the case of a scanner). If a color needs to be output and is outside the gamut of the output device, it must be mapped or approximated to some other color, which exists within the gamut. Rendering Intent enables you to compress out-of-gamut colors into the color capability of the press you are using. You can set any rendering intent value for CMYK elements by selecting the required from the Rendering intent list. The default value for CMYK is Relative Colorimetric. In addition, you may also select to emulate the paper tint and adjust the white point value of the used paper stock. For example, if you want to simulate pink paper stock while using white paper stock, you may use the corresponding emulation profile and select the Emulate source paper tint check box. The result will be that in addition to the job emulation, the paper tint will be also emulated and will have a pink shade.