[Gimp-user] HELP Color error using cmyk

[walshlg <forums gimpusers com>]

Ive had this issue in 2.10.0-2.10.10 and I  really need help:
The cmyk color I apply is not what is detected when I recheck with color picker.

I MUST use cmyk as i'm modeling for an inkjet colored 3d printer.  (inkjets use
c,m,y,k colored inks) I'm trying to make a skin color that works (printer color
is also all off) so I Input 34,37,56,00 into cmyk, fill the selection with it
then use color picker and what I get is WAY off -> 0,4,33,34.  I cant handle ANY
black so this totally screws up the printed color.  Any ideas how to make gimp 
use the color I select and not change it??

TIA

-- 
walshlg (via www.gimpusers.com/forums)