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Re: File Preparation for 4 color Grayscale offset printing

Haha. This was by far the funniest reply.
Grayscale images in 4 color environment.

Actually, we've been using 2 high GCR Max Black CMYK profiles that I
built using both the GRACoL and SWOP data characterization sets
distributed by idealliance.org. Those profiles are used for the CMYK
conversion in PS and are also built into a device link with our
device's output profile (GCR3) which is installed in the RIP.

 From the responses I've received, I'm guessing I'm not doing so bad
and I should stop trying to control what's out of my hands. . . ?

If you're trying to print grayscale in a 4 color environment, then don't convert at all. Just leave the images grayscale. Any conversion into a CMYK colorspace is gonna' introduce CMY into the image, which will increase the probability of casting on press (which is what Martin was alluding to).

If you require the images to be in a 4 color space for proofing purposes, then just use the grayscale image to populate the black channel of a CMYK image.

Rich

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