Fiery XF 7.1

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Color Definition tab (Preferences)

You can select overprint characteristics, and make white point, and dE settings.

  • Overprint settings

    • Ink overprinting characteristics—Define how two or more spot colors will behave when printed on top of each other. A higher setting results in a darker printout.

      For example, an overprint value of 100% means that the colors will be completely added to each other - something that is not possible on a proper printing press. A lower setting results in lighter printouts because colors appear more opaque and hide parts of other colors.

    • Gamma—Modify the dot gain simulation for overprinting spot colors. This setting is applied to areas with a mixture of spot colors and process colors, or to areas that consist of more than one spot color. It lets you define non-linear behavior for overprinting.

    • Method—Define the overprint behavior of L*a*b* colors in the L*a*b* color space. The default setting is based on the Bradford and ROMM chromatic adaptation transforms (CATs). CATs are able to predict corresponding colors under different illumination sources.

      Command WorkStation supports many different chromatic adaptation models, including Bradford CAT, XYZ Scaling, vonKries, and Sharp CAT.

    • Overprint brightness of similar colors—Accentuate the brightness of overprinted colors that are very similar to each other - for example, yellow on yellow, or magenta on red.

  • White point settings—The color tint of the media is known as the white point. The white point of the print media affects the color accuracy of the printout.

    Particularly in a proofing workflow, it is important to be able to simulate accurately the color tint of the final media. You can use a measuring device to measure the media white point. The measured white point is taken into account in your spot color definitions.

    By including the paper white in the spot color definition, spot color values can easily be adjusted for use with different media to ensure that color accuracy is maintained whatever substrate is used.

  • Gamut check settings—Check how accurately an L*a*b* spot color can be reproduced using the selected profiles. You can also check if an L*a*b* spot color lies within the color gamut of your printer. The color gamut describes the full range of colors that the printer can reproduce.