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1. Re: 'greyscale' RGB image, need to convert to specific CMYK black... how?
John Danek Nov 4, 2011 6:27 AM (in response to Simon Gregory)No. There is no quick and easy way to do what you want done. I would start with each channel, but I would think you'd need a solid area to measure in order to get your percentages to where you want them.
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2. Re: 'greyscale' RGB image, need to convert to specific CMYK black... how?
PECourtejoie Nov 4, 2011 6:46 AM (in response to Simon Gregory)Without seeing the image, it might be a shot in the dark, but what about creating a new CYMK document, of the same size as the RGB one. Add a layer filled with the 40/30/20/100 black.
Go to the RGB image, In the Channels panel, drag the red channel to the new channel icon. Drag this new channel to the CYMK channel panel. Add a layer mask to the 40/30... layer. go back to the channels panel, and target only the copied channel, copy it, target the layer mask channel, paste. Target the Layer mask, invert it.
Now, select and bring the red part from the RGB image, and you should be good to go...
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3. Re: 'greyscale' RGB image, need to convert to specific CMYK black... how?
Simon Gregory Nov 6, 2011 12:49 PM (in response to Simon Gregory)Thanks for that, both answers are helpful in their own way...
cheers, simon


