[scribus] hi and cmyk tiff export

minombresbond minombresbond at gmail.com
Fri Jan 16 08:26:39 CET 2009

2009/1/15 John Culleton <john at wexfordpress.com>:
> On Wednesday 14 January 2009 05:58:48 pm minombresbond wrote:
>> hi
>> I'm graphic designer from argentina, and user of free software, my
>> name is Juan Suárez
>> many times I need design simple vectorial works (like a logo) when
>> acurate control of cmyk values, for example, a figure with radial
>> gradient from 100/60/0/0 to 100/60/0/40, I can draw it in Scribus
>> and export to pdf to printing ok, or export to RGB bitmap or as rgb
>> svg to work in inkscape etc,
>> but how can I make a cmyk bitmap image from cmyk vectorial art
>> from scribus? like a 'exporting to cmyk tiff' feature? if I export
>> to RGB bitmap, and convert to cmyk space (with imagemagick or gimp
>> separate pluggin, with icc profile), the result is that
>> CMYK-to-RGB-to-CMYK ever change the original values, specially the
>> cmyk colors with zero value in any C M or Y, and high K: in this
>> case
>> CMYK:100/60/0/40 to  RGB:10/40/97  to CMYK:100/76/29/16
>>     V                                     V
>>     V                                     V
>> CMYK:100/60/0/0  to  RGB:33/66/148 to CMYK:99/60/4/0
>> its really differents gradients and colors!
>> the solution: implementing a *export to cmyk bitmap* feature! :)
>> Scribus is the only mature vectorial software where a designer can
>> draw any vectorial art whit colors and gradients in CMYK values
>> (and thinking in the offset machine!), and if is there any problem
>> with the pdf format in the filming provider, as far as I was, no
>> other method to export the artwork! I think that is an important
>> issue
>> my actual solution: export to cmyk pdf and use ghostscript to
>> generate a cmyk separation to tiff device:
>> -dTextAlphaBits=4 -dGraphicsAlphaBits=4 -sOutputFile=output.tif
>> -r120 -MaxSeparations=8 example.pdf
>> (seen on this page: http://wiki.contextgarden.net/Colors I have no
>> idea about ghostcript!)
>> this gs command generate output.tif and four c,M,Y,K grayscale
>> outputs tifs, work fine with
>> and I can re-import the cmyk tif to scribus artwork
>> this excentric export to cmyk tiff is very usefull to my, thanks!
>> saludos! sorry my bad english
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>> http://lists.scribus.net/mailman/listinfo/scribus
> The tools in ImageMagick can be helpful here, specifically the convert
> command.

I try cmyk pdf to cmyk tif with imagemagick, but I get only a
cmyk/rgb/cmyk conversion

> -- pero solo pude recorrer la mitad del camino
> John Culleton
> Resources for every author and publisher:
> http://wexfordpress.com/tex/shortlist.pdf
> http://wexfordpress.com/tex/packagers.pdf
> http://www.creativemindspress.com/newbiefaq.htm
> http://www.gropenassoc.com/TopLevelPages/reference%20desk.htm
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