RE: ICM 2.0 and CMYK Drivers/Profiles
RE: ICM 2.0 and CMYK Drivers/Profiles
- Subject: RE: ICM 2.0 and CMYK Drivers/Profiles
- From: "Cedric Briscoe" <email@hidden>
- Date: Sun, 27 Jun 2004 13:12:47 -0400
Thanks Chris.
I am trying to Color Management an environment based on Mirosoft Word
Proposals being printed on a Xerox 7700 and Xerox DocuColor 3535. The 3535
uses ColorWise Pro Tools 2.0 but I profiled it with the internal profile
turned off because there is also a requirement to have the devices match
each other [as best they can]
Designers are creating stuff in Illustrator and Photoshop PowerPoint, Excel
and whatever else. What I discovered is that MS Word, which is the layout
program being used imports and manages EVERYTHING (except eps) as sRGB.
I START Color Management with converting this MS Word file to PDF (Leave
Color Settings Unchanged) and I discovered that everything is sRGB.
So, I have to convert THIS file (containing RGB Bitmap & RGB Vector objects
only into the custom CMYK profiles of the two Xerox Devices. Having to
choose only one intent, I am going to use Saturation (vector color rendering
being more important than images).
The conversion works in Acrobat 5 & 6, assigning the profile as the output
profile but 1.) Acrobat will use its' default Relative Intent (I want
Saturation) and 2) when the file is FIRST converted to PDF, R=0, B=0, G=0
becomes C=91.8, M=87.1, Y=82, B=93.3
Now, when I personally got into Audio Equipment (In the 80's) I started with
a German Speaker Maker named CANTON...never looked back; and when I Got a
Plasma Panel 2 years ago I got a Fujitsu PDS-4242 ($10,000)...never looked
back; when I started With Color Management and thanks to RWCM <smile> I got
IQueue Color Server...and STILL never looked back.
IQueue lets me use RI Intent the RGB images and Saturation for the RGB
Vectors and preserves Black for Images AND Vectors (fixes the text) AND
let's me use a device link to match one printer to the other and even use a
gradation curve for vector and/or bitmaps before the color transforms for a
quick edit and thanks to the new PM5 I can update the profiles with a
50-step post linearization to keep these printers calibrated. (Even though
MonacoPROFILER has had this priceless feature for sometime but I wanted to
try the new Gamut Mapping, LOGO Colorful since the gamut of the color is
small (right around USSheetfed Coated2)
Will part2 of RWCM tell me how to do all of this with two profiles and the
color management tab of a windows printer driver with no Alcohol involved?
Anyway, ICM would be great because it lets you choose the rendering intent
in the driver so the designers can use Graphics/Saturation for the inside
matter and Pictures/Relative for the Covers, giving then a 'little' control.
If I can't get ICM to work, I will create an Acrobat Color Settings file for
all the users to properly generate the PDF and set the printer profile in
Acrobat Advanced tab and let (ACE) do the conversion.
The Real World problem I face is fixing the text (without user intervention,
if possible) and will Acrobat use Saturation Intent if a make it the default
Intent in the Profile? Or if I alter the Color Settings file leaving colors
unchanged but alter the Intent from 'Default' to 'Saturation', will acrobat
honor this? I am not too up on ICC to Postscript CSA w/ Rendering Intents.
And I don't even thing Callas or Enfocus could find the evidence of the
Intent being applied. 'Course you could give the Postscript code a peek.
Cedric Briscoe
Treetop Publishing, Inc.
-----Original Message-----
From: email@hidden [
mailto:email@hidden]
Sent: Sunday, June 27, 2004 11:51 AM
To: Cedric Briscoe
Cc: email@hidden
Subject: Re: ICM 2.0 and CMYK Drivers/Profiles
On Jun 27, 2004, at 5:40 AM, Cedric Briscoe wrote:
>
Has anyone ever tried [with any success] to get Window ICM 2.0 to Color
>
Manage a CMYK Postscript device?
>
>
>
>
I have built and placed a CMYK v2 printer profile (PM5/Colorful) in the
>
color management tab of a Xerox Phaser 7700 and selected ICM Handled
>
by Host
>
System in the driver and Graphics rendering (which is the Saturation
>
Intent
>
for ICM). Problem is, when I create a postscript file from a PDF file
>
through the Xerox Driver with the above settings and with all RGB data,
>
after the file is Distilled with a Leave Color Unchanged setting, the
>
resulting PDF file is STILL RGB (Pitstop's Imaging Matching Panel) and
>
when
>
I look into the Postscript stream, using a text editor, I see the RGB
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data.
>
Why isn't the color conversion taking place?
What application are you printing from? If it's from an application
that generates its own PostScript, in-host color management with ICC
profiles does not occur. It must occur prior to PostScript generation.
If the application is GDI/GDI+ then color management in-host can act on
that stream because it's converted to PostScript by the OS after color
transforms have occurred.
I suspect that if you print from something like Publisher, Word, or
Internet Explorer that the conversion will have occurred. But as you
mention it's a CMYK destination, I'm wondering if in the GDI world
everything is RGB (but then why would it let you select a CMYK
profile), and it would need to be a GDI+ app to do CMYK.
>
At this point, it won't hurt to try a v4 profile. But, I would like any
>
suggestions anyone can offer.
I wouldn't recommend it. That's likely to do nothing even if it should
do something because v4 profiles aren't supported by ICM.
Chris Murphy
Color Remedies (TM)
www.colorremedies.com/realworldcolor
---------------------------------------------------------
Co-author "Real World Color Management"
Published by PeachPit Press (ISBN 0-201-77340-6)
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