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guc · #1 (**permalink**) 11-16-2005, 04:19 AM

I have two images containing the same background colour (checked in photoshop C4M9Y13B4, no colour profiles attached), one has been saved as a EPS file, the other as a DCS file as it contains some extra type which is on a gold spot channel.
The images are placed in a QuarkXPress 4.1 spread. When I received back the wetproof from my reprohouse I had a huge colour shift in the background of the DCS image. Can anyone think why this should occur?

macdevin · #2 (**permalink**) 11-16-2005, 10:13 PM

Quote:

Originally Posted by guc

I have two images containing the same background colour (checked in photoshop C4M9Y13B4, no colour profiles attached), one has been saved as a EPS file, the other as a DCS file as it contains some extra type which is on a gold spot channel.
The images are placed in a QuarkXPress 4.1 spread. When I received back the wetproof from my reprohouse I had a huge colour shift in the background of the DCS image. Can anyone think why this should occur?

If what you say is correct, then your reprohouse $%^# up!
a DCS file is an eps files that is seperated. Some RIPs have problems with DCS. I would find another reprohouse if this is the case.

How do you know you don't have ICC in the file? I find that most user don't know how to check?

Devin

guc · #3 (**permalink**) 11-17-2005, 02:07 AM

Just by selecting the file in the the file browser option in Photoshop CS under the preview pane you will find the meta data which include "Color Profile". Regarding the colour shift I agree with you that it happenend @ the repro house but are just trying to pinpoint exactly where it happened. I think they created a CTP pdf file from the job and was wondering if any settings in the PDF options might have caused the color shift.
Gudrun

Earendil · #4 (**permalink**) 01-03-2006, 02:35 PM

In addition to some rips having problems with DCS files, Quark has problems getting the spot info right. In the newer Quarks you have to output color as DeviceN to retain spot info. Still, it's hard to tell when we don't know what the prepress goons at the repro house did to it.

detric_1 · #5 (**permalink**) 01-03-2006, 10:48 PM

Was the DCS file rasterized or otherwise of low quality? You can't (easily) put a dcs file into a pdf file, especially with quark. If they printed composite...it's gonna just rasterize the low res preview file. That would give you a change in the background.

Also...maybe if they opened up one of the images, it said that it didn't have an icc profile, they assigened thiers and their rip is set to convert with embedded profiles?

Only two ideas I can come up with.

Dave

guc · #6 (**permalink**) 01-04-2006, 03:52 AM

Because we are seperating our text black from our image black when they recombined the two the knocked out the image black from the 4 colour images when outputting the film.

mattbeals · #7 (**permalink**) 01-04-2006, 08:46 AM

Why make a DCS2 file? That's preseperated. Are you taking into account any color management when seperating the file? If you have two blacks, you can achieve the same thing by keeping everything composite and making your second black (text black lets say) overprint globally.

DCS2 can be great, but sooo 20th century (like TIFF/IT-p1 is)

jun · #8 (**permalink**) 01-14-2006, 06:31 AM

if thats the case, it is a rip issue.maybe the rip does not work properly on DCS files.just send them an EPS files