Tino Schwarze schrieb am Montag, 23. Juni 2008: > On Sun, Jun 22, 2008 at 11:39:51PM +0200, Jan Schrewe wrote: > > > The file will go to an offset print shop[1]. They demand PDF/X3 with > > > ISOCoated v2 profile which is what I will provide. I fiddled around > > > with gs and cinepaint to check CMYK values and it doesn't look good at > > > all (there's no black any more in the files converted using tifficc in > > > final PDF/X3 output), but I suppose this is some other glitch, maybe in > > > gs (8.50) or in cinepaint... which tool would allow me to check real > > > CMYK values in PDF output? > > > > You don't need to convert your images from RGB to CMYK before you import > > them into scribus. Scribus dows take care of that. > > > > The same goes for colors. As Andreas already said: Define a black in RGB > > and let scribus take care of the conversion. You need to make sure that > > you use the same input profiles for your colors and your images, though. > > In theory, yes. But my tests show that RGB-0/0-0 black as a colored > rectangle is different from an RGB-0/0/0 black image. Even on screen it > looks very different! When I export to CMYK-PDF and look at it in > acroread8, it also looks _very_ different. It is not just some > almost-indistinguishable difference, you notice it instantly. And I'm > not going to try to print that. > > I only use two profiles: sRGB for all RGB, ISOcoated v2 for all CMYK. > I only get a coherent appearance if I use a huge black image as > background as opposed to a color (either CMYK or RGB, I couldn't find > something that matched). > > Something in Scribus' RGB image -> CMYK workflow is different from it's > RGB color -> CMYK workflow... > > Tino.
Are you using the same profile for "Solid Colors" and "RGB Images" in the color management settings? Scribus can apply different profiles to them. Does the image have a profile embedded? Is the rendering intent the same as for the colors? That is something I have had quite some problems with.
