Re: separations for gum printing
22 Kasım 2008, Cumartesi, 4:32 pm tarihinde, sam wang yazmış: > ... > To see the differences, you might duplicate an RGB file and convert > the dupe to CMYK. Then duplicate both of these and invert them to > negative. Then compare the channels of each file and the differences > would be very evident. (By the way, your example looks like you > inverted it to negative BEFORE converting to CMYK. Correct?) > ... Dear Sam, No, I did it exactly as you describe. I use a custom cmyk profile; ink colors: swop newsprint, dot gain 0%, GCR, Black generation = None, Black limit = 0, Total ink limit = 300%. (My observation is that GCR and UCR are equal as long as you keep Black generation setting at "None".) If I had a spectrophotometer (and wanted perfect color-match), I'd use the custom ink colors dialog to enter the Lab coordinates of paints and overprints but that's far away of my actual intentions... Thanks for commenting. Regards, Loris.
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