On Sun, Jun 22, 2008 at 09:36:31PM -0400, Andrew A. Gill wrote: > > Thanks, I verified that using my testfile and cmyk colors come out as > > expected. I can't check the images this way, though. Strange: When I run > > the EPS file through ghostscript[1], my 40/40/40/100 black seems to get > > converted to 0/0/0/100 black - at least I can only see this kind of > > black in Cinepaint. :-( > > Two things that I forgot to mention: > > 1.) Use postscript, not encapsulated postscript. There shouldn't > be any difference, but it's better to remove any possibility of > error. (print to file using postscript) > > 2.) I'm getting a spot color (SpotRich_Black) in my PS outputs. > Looks to be Rich Black. See below.
Me too. After I unchecked the "registration color" checkbox, the Rich Black came out as 0.4 0.4 0.4 1 in the EPS as expected. It doesn't come through to TIFF though. > And now a third point: > > 3.) I tried printing separations, and I got interesting results. It looks like ghostscripts eats some colors. > The black separation shows everything pure black, except the RGB > black image, which is rather lighter than the rest (to be > expected). The cyan separation only shows the RGB black and the > stroke around Total Black. The magenta and yellow separations > both show the same as the cyan, though the magenta separation of > the RGB image is lighter than the cyan separation, and the yellow > is much lighter than all of them. The stroke around the total > black appears to remain the same intensity. > > As to the spot color, it is only present in the stroke around the > Rich Black box. It is not visible in any of the separations, > even if I turn on convert spot colors to process colors. I get the same results. Looks like a Ghostscript problem to me. :-( Hm, maybe I'll check the latest ghostscrip version. The overall summary of my experiments: There seems to be no way to get a CMYK image from a CMYK PDF on Linux, since the only way is through Ghostscript which doesn't preserve CMYK colors 1:1. Thanks, Tino. -- "What we nourish flourishes." - "Was wir n?hren erbl?ht." www.craniosacralzentrum.de www.forteego.de
