[Scribus] grayscale images imported as RGB?

Lila Pagola lilapagola
Mon Mar 12 23:09:23 CET 2007

thanks for both answers! It's good to know there was something happening
just to my files!

The solution I found for the images in question, very graphic, was to
vectorize them in Inkscape.
Of course, it isn't a real solution because a photograph couldn't be treated
that way, but for photos the CMYK it will be fine, even better than
grayscale I think.

Regarding to PDF, here some prepress offices don like them at all, and they
ask for EPS or ai/cdr, etc... Even when printing the pages of the book, we
found some bug in the postcript printer that generated the originals because
it can't neither mirror them nor separate colors. So, we have to use Scribus
files and print separations directly from there: and absolute exception in
the normal workflow of a normal press, you can guess ... because they have
to install Scribus!

thanks again,

2007/3/12, Vladimir Savic <vlada at ehost.co.yu>:
> On Monday 12 March 2007 17:43:36 Terence Chan wrote:
> > Yes, I believe this is normal behaviour for scribus - why is this
> > a problem? So long as you apply the appropriate icc input and output
> > profiles the greyscale images should appear ok when printed and on
> > the screen.
> >
> > Terence
> Hmmm...
> I was doing something obviously wrong here too (talking about Scribus
> 1.3.3.x
> not 1.3.4cvs). "Appropriate profile" is a key point. No profile can ensure
> grayscale RGB (picture in RGB color space but completely constructed of
> r=g=b
> values pixels) picture to appear on K plate only when PDF gets token to
> prepress office.
> Right approach would be to ask of user if imported picture is composite
> grayscale picture or single color channel image. Fortunately, in 1.3.4there
> is a simple solution: image effects -> apply colorize image and give that
> picture 'black' color colorization (Don't take further writing for granted
> but I think choosing 0%C 0%M 0%Y 100%K "in-Screibus hand made" color
> doesn't
> work correctly)
> Vlada
> > On Sun, 11 Mar 2007, Lila Pagola wrote:
> > > hi!
> > > I'm working with Scribus in a book, almost finished, because we are in
> > > press with everything except cover.
> > >
> > > Preparing the cover design for pre-press (I don't if in english it's
> said
> > > that way), I have found a rare behavoir of Scribus with grayscale
> images:
> > > they are considered as RGB files, in any format I try to import them
> > > (PNG8, gif, tif). And If I import them as CMYK I have information in
> the
> > > 4 channels when the image is just black.
> > >
> > > Somebody has experiencied something similar? Am I doing something
> wrong?
> > > I did a quick search on the web and the list's archives and I didn't
> find
> > > any report of this problem.
> > >
> > > Our project has a wiki when we are uploading the problems and
> solutions
> > > we found, in spanish, sorry (and for my english sorry too)
> > > the url is http://nomade.liminar.com.ar/wakka.php?wakka=MaBI
> > >
> > > Thanks in advance for any clue ...
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