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This is a bit of a narrowed-down redux of a post I submitted a few weeks ago (Thanks to Mike Russell for responding before; some lingering questions remain)
I am preparing a CD insert layout in which I am including several images shot in B&W (on film) and scanned in from prints. (Resolution is OK at the effective enlargement I am using them).
The scanned image files were delivered to me as RGB TIFF’s. At this point, I simply converted to CMYK in PS-CS2, did some rudimentary contrast/brightness adjustment, scaled to the proper layout size and imported them into the Illustrator layout.
But I am somewhat concerned that the CMYK "color build" of the images is not ideal for print;the separations are not the same, and the brightness/contrast adjustments have left some images with a subtle hue shift relative to others. Additionally, close examination of some images uncovers some subtle and not-so-subtle color shifts or certain details, e.g guitar strings that end up with a bronze tinge in a *black-and-white* image, subtle rainbowing at high- contrast edges, etc.
So, here’s today’s question: should I smash these images to greyscale to remove the color artifacts and then rebuild them so that the image’s CMYK separations track proportionately from white to my CMYK black? Or is there some better approach that can be recommended as a generic formula to apply to black-and-white images intended for full-color offset printing?
It’s not so much *how* to do it (in CS2) — I have plenty of unearthed newsgroup articles for that. It’s *what* to do.
Bob
I am preparing a CD insert layout in which I am including several images shot in B&W (on film) and scanned in from prints. (Resolution is OK at the effective enlargement I am using them).
The scanned image files were delivered to me as RGB TIFF’s. At this point, I simply converted to CMYK in PS-CS2, did some rudimentary contrast/brightness adjustment, scaled to the proper layout size and imported them into the Illustrator layout.
But I am somewhat concerned that the CMYK "color build" of the images is not ideal for print;the separations are not the same, and the brightness/contrast adjustments have left some images with a subtle hue shift relative to others. Additionally, close examination of some images uncovers some subtle and not-so-subtle color shifts or certain details, e.g guitar strings that end up with a bronze tinge in a *black-and-white* image, subtle rainbowing at high- contrast edges, etc.
So, here’s today’s question: should I smash these images to greyscale to remove the color artifacts and then rebuild them so that the image’s CMYK separations track proportionately from white to my CMYK black? Or is there some better approach that can be recommended as a generic formula to apply to black-and-white images intended for full-color offset printing?
It’s not so much *how* to do it (in CS2) — I have plenty of unearthed newsgroup articles for that. It’s *what* to do.
Bob
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