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

[rich404 <forums gimpusers com>]

....snip....

> 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
blue)

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

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

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)