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Creating an image with all the info in one channel

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  #1  
Old 08-03-2010, 08:46 AM
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DJSoulglo DJSoulglo is offline
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Creating an image with all the info in one channel

I have a question,

I have some black and white images and for a publication we need to deliver these as CMYK images, but with all the info in the K channel.

I'm creating an alpha channel of the RGB version, then making a new CMYK doc, filling the selection with 100% black. Then duplicating that layer to get the same kind of density and adding a white back layer, just to get it to look like the original. Now this works, barely, but I'm hoping that someone here knows a slightly easier/better way to do this.

Thanks!
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Old 08-03-2010, 10:26 AM
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Der_W Der_W is offline
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Re: Creating an image with all the info in one cha

I guess you could just convert these to grayscale using "Image"-"Mode"-"Grayscale".
From what I've heard this works like the K-channel alone (although I'm not sure. I'm not so much into printing so far).
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Old 08-03-2010, 05:01 PM
Steve13 Steve13 is offline
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Re: Creating an image with all the info in one cha

Desaturate or grayscale or however you get the best b/w image, select all, cut, change mode of empty doc to cmyk, paste into K channel.
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Old 08-10-2010, 10:56 PM
franko60 franko60 is offline
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Re: Creating an image with all the info in one cha

Whichever way you do it you're going to end up with a flat B&@ image. For good black and white production I've always done 4 colour separations. Using the black channel alone will never get good reproduction, I'm afraid. I'm really surprised any publication is asking for this now, as every one I know and prepare images for run 4 colour over the whole run of press.
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Old 08-12-2010, 02:09 PM
mushmush mushmush is offline
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Re: Creating an image with all the info in one cha

I definitely agree with Franko60- your 3/4 tones are gonna be really weak without the CMY.
Are they saving money on Plates?
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