[Scribus] the meaning of the "Use ICC Profile" option

[Riku Leino]

> Can some developer explain the meaning of the "Use ICC Profile" option,
> found on the Save as PDF panel, Color tab?

When pdf target is set to "Printer" and "Use ICC Profiles" checkboxes are not 
checked the pdf will be created with DeviceCMYK color space (open the pdf in 
a text editor or podofobrowser and check yourself). If a checkbox for "Use 
ICC Profiles" is checked then the color space will be ICCBased and colors 
will have their current icc profile embedded in the pdf for output device to 
be able to convert the colors to it's own color space.

So if you have the correct printer profile already when creating the pdf I 
don't see any need for "Use ICC Profiles" since the pdf color space will be 
already correct for the target printer. If you know that your printer's setup 
can handle embedded profiles then there's no harm in using this option. There 
was a semi serious bug (http://bugs.scribus.net/view.php?id=5416) related to 
this which was fixed 10 or so minutes ago. So you may want to wait till the 
anoncvs is synced and try yourself.

A test pdf with DeviceCMYK color space can be seen at 
http://www.saunalahti.fi/rikle/cmyk-test-fixed.pdf There are three images on 
the pdf the top most one is converted to cmyk in PS middle one in Krita and 
the last one has been converted by Scribus (was a RGB image when imported to 
Scribus). All conversions were made with similar setup using ECI ISO Coated 
V2 profile.