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Spot-Color Channels

When you print color separations of a CMYK file, you get four plates—one plate per channel. So it's logical that if you want a spot color (or varnish or whatever) to print on its own plate, you have to add another channel to your image. Photoshop has a special kind of channel for spot colors called (you guessed it) a spot channel. Spot-color channels are, in most respects, identical to normal channels on the Channels palette. The primary difference is that they display on screen looking like spot colors—more or less. To create one of these beasts, select New Spot Channel from the popout menu on the Channels palette (or, faster, Command-click the New Channel button at the bottom of the palette).

The New Spot Channel dialog box offers you three controls for your new spot color: Name, Color, and Solidity (see Figure 11-1).


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