CMYK issue: Krita or Cyan

[enrimoore]

thanks again 
Nikon is ok, but no help with CMYK there. And for a book cover.
Really for me Gimp is quite good, what I need is the CMYK thing.

I don't have imagemagick, but very strange your result.
Pity, I can't attach some example.

But the results are really weird in jpg
What I use is online   https://www.textcompare.org/image/#google_vignette
it's very consistent I did hundreds of tests for many types of conversion,
zero issues except in this particular case 

Your finding makes me wonder if I am doing a mistake...
but I simply open a file , in Krita or Cyan, check the color space, then convert usually to 
isocoatedECI, then I export (in Cyan save) to jpg and then to tiff. 
So the image in workarea should be identical, as I don't change anything between the 2 exports.
I even tried all possible settings in Krita for jpg and tiff.

I could try to export once and then close the original file. Then open it again and do the second export.
But if it works, I might go really crazy

Well could you try with this very simple file? the result is weird (93% ) and apparent

enri