Teach Yourself Adobe Photoshop CS2.pdf - Online Public Access ...

This document was created by an unregistered ChmMagic, please go to http://www.bisenter.com to register . it. Thanksdecreased by more than 1MB.3. Before moving on, you need to return the image to its original RGB state. Choose File Revert.This time, you're going to change the RGB image to CMYK. This process becomes enormously important if you'll be taking yourimages to a commercial printer. RGB can display a number of colors that CMYK, by the nature of its four inks, cannot reproduce.The inks, for instance, can only approximate neon colors.Before making the mode change, let's take a closer look at some of the colors in this RGB image to see whether they can bereproduced in CMYK (see Figure 5.8).Figure 5.8. The triangle symbol means that the color is out of the CMYK gamut.[View full size image]A. Click the Eyedropper tool in the toolbox.B. Next, open the Color palette by choosing Window Color.C. Use the Eyedropper to select (click) a color in the image. Try clicking the orange stamens in the center of the lily.D. Look in the Color palette. Is there an out-of-gamut warning there? This little triangle indicates that the selected colorcannot be reproduced precisely by the process colors of CMYK.E. To get an idea how far out of gamut your colors are, choose View Gamut Warning. This gives you an indicationof the colors that will be lost or modified during the translation of RGB mode to CMYK. Figure 5.9 shows what the gamutwarning looks like for this picture. Out-of-gamut areas are shown as gray patches.Figure 5.9. The dark patches are out of gamut.