Adobe 23101335 User Guide - Page 397
Specifying overprint colors, Saving and loading duotone settings, Viewing individual printing plates
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ADOBE PHOTOSHOP 6.0 387 User Guide Specifying overprint colors Overprint colors are two unscreened inks printed on top of each other. For example, when a cyan ink prints over a yellow ink, the resulting overprint is a green color. The order in which inks are printed, as well as variations in the inks and paper, can significantly affect the final results. To help you predict how colors will look when printed, use a printed sample of the overprinted inks to adjust your screen display. Just remember that this adjustment affects only how the overprint colors appear on-screen, not when printed. Before adjusting these colors, make sure that you have calibrated your monitor following the instructions in "Creating an ICC monitor profile" on page 136. To adjust the display of overprint colors: 1 Choose Image > Mode > Duotone. 2 Click Overprint Colors. The Overprint Colors dialog box displays the combinations that will result when the inks are printed. 3 Click the color swatch of the ink combination you want to adjust. 4 Select the color you want in the color picker, and click OK. 5 Repeat steps 3 and 4 until the overprint inks appear as you want them. Then click OK. Saving and loading duotone settings Use the Save button in the Duotone Options dialog box to save a set of duotone curves, ink settings, and overprint colors. Use the Load button to load a set of duotone curves, ink settings, and overprint colors. You can then apply these settings to other grayscale images. The Adobe Photoshop application includes several sample sets of duotone, tritone, and quadtone curves. These sets include some of the more commonly used curves and colors and are useful as starting points for creating your own combinations. Viewing individual printing plates Because duotones are single-channel images, your adjustments to individual printing inks are displayed as part of the final composite image. In some cases, you may want to view the individual "printing plates" to see how the individual colors will separate when printed (as you can with CMYK images). To view the individual colors of a duotone image: 1 After specifying your ink colors, choose Image > Mode > Multichannel.