[scribus] How to assure pure black and not rich black.

Gregory Pittman gregp_ky at yahoo.com
Fri Jun 26 15:08:25 CEST 2009

John Culleton wrote:
> I presume this can be done through the correct color profile. Or 
> perhaps it requires a redefinition of the black color swatch. Or 
> maybe it is the default.  The manual defines rich black but does 
> not explain at that point how to get either rich black or pure 
> black. 
> The issue comes up because some process color presses will not 
> accept a combination of colors which together add up to more than 
> 240% total density.
> Guidance appreciated.   

Pure black, AFAICT, is defined by CMYK as 100% K, 0% C, M, and Y. There 
can be a problem in Scribus trying to get pure black as an end result, 
since and RGB with 0 for each value will probably not result in pure 
black. We've had a number of submissions to the list where it seems the 
sender gets obsessed with getting pure black, and consequently gets 
upset at not achieving it.

In the end, I think it should come down to getting the visual color of 
black you want with the printed product rather than some absolute 
mathematically pure black.


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