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An advertisement that will print in grayscale or black plus one color.

Posted on 2004-09-05
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Last Modified: 2010-04-03
I wish to create a grayscale ad with pictures and type and then add two process yellow rectangles on which type will sit that is already in the ad. I would like to be able to bevel or shadow the rectangles and have the ad print in a magazine as black or grayscale plus one color and not as four color.  The ad would be sent on a CD with most publications accepting PDF.
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Question by:cowlife
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Lobo042399 earned 250 total points
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Hi Cowlife,

What you're talking about is called a multichannel image in Photoshop lingo. For your particular situation what I'd do is set the grayscale images and type in separate layers in CMYK mode. Then draw your rectangles in another layer. If the grayscales are gonna trim the rectangles you'll need to create a selection that will be used later as a clip mask. You may also want to save selections for the text and for the rectangles.

Once you have all the elements set you can go to your Channels palette, Select All, make the Cyan Channel active and hit Delete. Do the same for the Magenta Channel. This will leave you with only the Black and Yellow channels, plus your alpha channels. While still in the Channels palette, you can load your selections and use them as masks to clean up any yellow you don't need in the Black Channel and any black you don't need in the Yellow Channel. You can also use the rectangles selection and your Curves to adjust the halftone beveling in the rectangles, or to adjust the rectangles shadowing in the Black Channel.

For added safety, you can save a copy of your PSD file and flatten the Layers in it. This will make life easier for the mag people.

Make sure you create your image at a resolution adequate for the stock it'll be printed on. You can get the mag's particular requirements from their art people. Printers like it when you ask them for their specs, they'll be more than glad to give you all that info.

Good Vibes!

Lobo
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