[Gimp-user] CMYK Out of Gamut due to GIMP version-- or my PC monitor


I've heard of Krita and I'll download it and see if it will do the
trick.  Is there anything in particular I need to know about it?  The
essential thing is that the final file has to be in PDF, and not just
any PDF, but  PDF/X-1a:2001 or PDF/X-3:2002.  But I'll climb that hill
when I get to it.

(Incidentally, I did mention the OSs--- Windows 10 on the PC and
Windows 7 on the laptop.  Does that affect anything?)

Gimp does show just about everything out-of-gamut and so does Krita.

I can never quite believe that indication, so borrowed a PS and this shows their
interpretation. Top the RGB jpeg and bottom the CMYK jpeg from a Krita
colourspace conversion. To me that look more credible than Gimp which is purely
a RGB editor. Bright colors subdued as mentioned before.

screenshot: https://i.imgur.com/ne4c3Pk.jpg

Krita does show out-of-gamut, screenshots of the setup. I advise promoting to 16
bit, if you want to adjust the image. A re-export will reduce to 8 bit, that is
the jpeg standard.

screenshot: https://i.imgur.com/KbIRU7q.jpg

Adjusting the HSL sliders removes out-of-gamut but leaves the image very flat.
You will not like that. I would go for the straight conversion. (you can do
exactly the same in Gimp 2.10 using Hue-Chroma filter but it removes most of the

screenshot: https://i.imgur.com/KbIRU7q.jpg

Need a CMYK PDF for the printer. Only one (free) application and that is

The professionals will have a color profiled monitor. The equipment for that
costs and not easy to set up.

Some hints here: https://www.cambridgeincolour.com/color-management-printing.htm
Most laptop users have their screen far too bright, have a look there for a
simple adjustment.

Best of luck.

rich404 (via www.gimpusers.com/forums)

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