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

John Beardmore John at T4sLtd.co.uk
Sat Jun 27 13:28:52 CEST 2009

Gregory Pittman wrote:
> 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.     
> http://wiki.scribus.net/index.php/What_is_Rich_Black%3F
> 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.

Accepted, but presumably it is also a good thing to minimise ink
use as long as this doesn't compromise the quality of the black ?

Cheers, J/.
John Beardmore, MSc EDM (Open), B.A. Chem (Oxon), CMIOSH, AIEMA, MEI
Managing Director, T4 Sustainability Limited. http://www.T4sLtd.co.uk/
Energy Audit, Carbon Management, Design Advice, Sustainable Energy
Consultancy and Installation, Carbon Trust Standard Registered Assessor
Phone: 0845 4561332   Mobile: 07785 563116   Skype: t4sustainability

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