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Photoshop CS Bible @Team LiB - Stacy C.

Stacy C. Photoshop CS Bible @Team LiB - Wiley Publishing, 2004. - 773 p.
Download (direct link): photoshopcsbible2004.pdf
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If your duotone includes Pantone or other spot colors, converting to CMYK is not an option. But you can still access and edit the individual color channels. To separate the duotone inks into channels, choose Image® Mode® Multichannel. Each ink appears as a separate spot color in the Channels palette, as shown in Figure 18-14. You can experiment with different color combinations by turning eyeball icons on and off. You can even switch out one spot color for another by double-clicking the channel name and then clicking the color________________
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swatch. 1---------------------------
Figure 18-14: Here I chose Image® Mode® Multichannel to separate my quadtone into four independent spot-color channels, and then double-clicked the Deep Red channel to access the Spot Channel Options dialog box.
To save a duotone converted to the multichannel mode, you have just two options: native Photoshop
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Part V: Color and Output
(as always) and DCS 2.0. For complete information on the latter, read the QuarkXPress DCS section in Chapter 3._________________
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10.3.5 Spot-Color Separations
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Spot-Color Separations
Photoshop permits you to add spot colors to your images. Although its unlikely that youll use spot colors to widen the gamut of your photographs after all, scanners cant scan spot colors and Photoshop cant automatically lift them out of, say, the RGB color space you may want to toss in a spot color to highlight a logo, a line of type, or some other special element.
For example, suppose you have a full-color image of a jet ski. The logo along the side of the boat is fully visible, just as the client wants it, but the color is off. Normally, the logo appears in Pantone 265 purple. But the CMYK equivalent for this color looks about three shades darker, four shades redder, and several times muddier. The only solution is to assign the proper spot color Pantone 265 to the logo. The following steps tell how.STEPS: Adding a Spot Color to an Image Select the logo. You can use the magic wand tool or a more exacting method, as described in Chapters 8 and 9.
Fill the selection with white. Press D to get the default foreground and background colors and then press Ctrl+Backspace (z -Delete on the Mac). Its important that you erase the old logo so that it appears in pure spot color without any mixing with the CMYK inks. But do not deselect your selection! It must remain active for Step 5 to work.
Create a new spot channel. As explained in Chapter 4, the easiest way to do this is to Ctrl-click (Win) or z -click (Mac) the page icon at the bottom of the Channels palette. But you can also choose New Spot Channel from the Channels palette menu if you prefer.
Set the color to Pantone 265. Click the Color swatch in the New Spot Channel dialog box. Then select Pantone 265 from the Custom Colors dialog box. (If the Color Picker appears instead, click the Custom button.)
Press Enter or Return or click OK twice. Photoshop adds the new spot color to the Channels palette and fills the selection. Your logo automatically appears in the spot color. (Cool, huh?)
Choose Image ® Trap. Its a good idea to trap the spot color so that it covers up any gaps that may result from misregistration. Enter a value of 1 or 2 pixels and press Enter or Return. Photoshop spreads the logo but leaves the CMYK image alone. Very intelligent program, that Photoshop.
Save the image. You have two choices of formats, native Photoshop or DCS2.0. If you want to import the image to a different program, use the latter.
Naturally, you dont want to trust Photoshops on-screen representation of the spot color any more than you would in Illustrator, QuarkXPress, or any other program. The screen version is an approximation, nothing more. Therefore, its a good idea to have a Pantone swatch book on hand so that you know exactly what the color should look like when printed. (If the printed logo doesnt match the swatch book, its the printers fault, not Photoshоps.)
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10.3.6 Organizing Images for Output
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Organizing Images for Output
So far in this chapter, weve taken a look at the various printing options that Photoshop provides. Now well turn our attention to several automated methods of organizing images for presentation in print or on screen. Photoshop CS gives you expanded capabilities for creating contact sheets and picture packages, posting images in galleries on the Web, designing automatic PDF slideshows for your friends and family, and even merging multiple images into one large panorama.Tip Every single command that I discuss in the following sections can also be accessed through the Automate menu in the File Browser. If all you need to do is perform one of these commands on an image or group of images, the File Browser is the way to go. Its usually faster and more efficient, and you often dont even need to open the files youll be affecting! Printing contact sheets Choose File® Automate® Contact Sheet II to display the dialog box shown in Figure 18-15. The
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