Re: ColorSync and PostScript printing
Re: ColorSync and PostScript printing
- Subject: Re: ColorSync and PostScript printing
- From: Rolf Gierling <email@hidden>
- Date: Sun, 6 Mar 2005 01:54:11 +0100
Ok, I tried to take a deeper look at postscript printing.
I have an old Fuji FirstProof Rip with Tiff output capabilities.
I'm pretty shure it's completely unaware of any colormanagement.
It's been set up to produce CMYK-tiffs. If you send CMYK to it,
regardless of the space you actually choose, you get CMYK the
way the file was.
If you send RGB to it, the colors get totally washed out.
Using mail as the output app, setting the printer driver to colorsync
(quartz) colormanagment, I find the following:
1) There is no difference between untagged and Generic CMYK tagged
files.
If the printer is set up to use an output profile, same color matching
ocurs.
(this is in opposite to what I understood Chris said)
2) If the file is tagged with anything else, matching ocurs, but I
don't get the
numbers that I get for example in Photoshop. (This is what Chris sees)
3) If the printer is set up with no profile in the ColorSync utility
(unknown or
lost profile, I don't know the english phrase), things get silly:
If I print directly to the RIP, the file is obviously RGB!
If I save the file as postscript first (and I would have suggested that
this is the spool file)
and then drag that file onto the printer symbol, its CMYK again, but
again the numbers
are not reproducible in other apps.
Another observation is, why can you select non CMYK-profiles for an
CMYK-device
in the colorsync utility.
This and the behaviour of RGB-files has still to be done.
Rolf
-----------------------------------------------------
Multitools
Dipl.-Ing. Rolf Gierling
Colormanagement
Consulting - Development - Distribution
Mariabrunnstr. 16
52064 Aachen
Germany
Tel. +49 (0) 2 41 / 4 01 25 79
Fax. +49 (0) 2 41 / 4 01 25 83
email@hidden
Author of "Farbmanagement"
MITP Verlag GmbH, Bonn
ISBN 3-8266-1382-1
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