Re: Gimp-Print Output Problem
Re: Gimp-Print Output Problem
- Subject: Re: Gimp-Print Output Problem
- From: Robert L Krawitz <email@hidden>
- Date: Sun, 3 Aug 2003 15:27:08 -0400
Date: Sun, 03 Aug 2003 12:17:46 -0700
From: Tyler Boley <email@hidden>
Rick, in my tests on OSX, Raw CMYK is broken. At some point the
data goes back to RGB, with a very detrimental 100% GCR. There was
some dialogue between some of us and the developers verifying the
problem months ago. To my knowledge the issue has never been
rectified. The behavior of the driver is better under normal RGB
use than the RGB it converts to when using Raw CMYK. I'm still
hoping it will be addressed, postscript and straight CMYK
throughput would be great, particularly given the purchase price
I don't believe that we (CUPS, Gimp-Print, and Apple) have yet
resolved exactly what's going on here. For now I'd suggest using RGB
mode. 4.3 (when we fix another OS X related problem with that, and go
alpha) offers a lot of controls of its own for the GCR, which may
enable you to avoid this issue; the GCR controls we provide may be
sufficient.
The 4.3 issue with Gimp-Print is that the only way presently to print
is to print a file by dragging and dropping it onto PrintCenter;
printing from applications doesn't work (I'm in touch with Apple about
this issue; it's rather strange). Hopefully we'll resolve it soon
enough.
> Date: Sat, 2 Aug 2003 17:28:50 -0700
> To: ColorSync List <email@hidden>
> From: Rick Gordon <email@hidden>
> Subject: Gimp-Print Output Problem
>
> Using Gimp-Print 4.26. and OS 10.2.6, I printed ECI2000 and TC 9.18 targets on an Epson 870. The pages were output out of QuarkXPress 6 with color management disabled (turned off in preferences).
>
> The settings were:
>
> Photo Paper
> 1440 x 720 (highest quality)
> Photograph
> Eventone Dither Algorithm
> Six Color Photo
>
> Raw CMYK for the ECI2000 and Color for the TC 9.18. Output was seasoned for several days.
>
> I'm concerned because the target printouts are obviously skewed, and I can generate excellent profiles using the Epson driver. There are numerous light patches where there is no visible color. Target charts printed from the Epson driver (with no color management) are considerably darker.
>
> I haven't yet reprinted the targets out of Photoshop (which I trust -- I'm still experimenting with Quark 6' s output), but my intention is to optimize them for use (particularly the CMYK) when printing from Quark.
>
> Any clues before going off into a paper-wasting episode? Assuming that I can get a usable printout, what is the preferred dither algorithm -- adaptive hybrid, Eventone, or ???
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