Re: Preserve Numbers?
Re: Preserve Numbers?
- Subject: Re: Preserve Numbers?
- From: Rick Gordon <email@hidden>
- Date: Mon, 13 Nov 2006 13:03:04 -0800
On 11/13/06 at 7:07 AM -0700, Andrew Rodney wrote in a message entitled
"Re: Preserve Numbers?":
>On 11/12/06 8:12 PM, "Rick Gordon" wrote:
>
>> I would say that the Preserve Numbers option is not just about soft proofing,
>
>Sureit is. That's why it's in the customize Proof Setup in Photoshop. You're being shown how those numbers would appear if sent to the output device using that output profile but without converting the numbers (Preserve Color Numbers versus Preserve Color Apparence). The numbers are the numbers, the TAC is the TAC. The option is only a soft proof feature.
------------------
Andrew,
The option (Preserve Numbers - Ignore Linked Profiles) is available application/document-wide from Edit > Color Settings, and it can be accessed from the Print dialog in the Color Manaqement pane. You can still override it on an image-by-image basis.
Here is Adobe's commentary from the CS2 Printing Guide for Service Providers:
* A color settings file is CMYK-safe when its CMYK Color Management Policy is set to Off or
Preserve Numbers. If you make a customized color settings file and want to make sure it is
still CMYK safe, be sure to select one of those two policies. Your customers don't need to use
exactly the same color settings file that you do, as long as they use a color settings file where the
CMYK Color Management Policy is set to Off or Preserve Numbers.
* If you want to prevent all CMYK files from being converted, you can set the CMYK Color
Management Policy to Off (in the Color Settings dialog box). RGB objects are still converted
to CMYK. However, the Preserve Numbers policy does the same thing (ignoring profiles in
linked images) while enabling you to assign CMYK profiles to specific images on the layout as
appropriate. When you select the Preserve Numbers policy, you may want to make sure that
the Ask When Opening warnings for Profile Mismatches and Missing Profiles are enabled; the
warnings may indicate that a file was prepared for a different target profile or a different policy,
which means you may need to confirm output expectations with the customer.
* When selecting options for CMYK color conversions in the Print or Export Adobe PDF dialog
boxes, select Preserve Numbers or Preserve CMYK Numbers whenever possible. These options
don't alter the existing color values of a CMYK file that doesn't contain an embedded profile.
The Output panel of the Print dialog box contains the Preserve CMYK Numbers option when
you set the output to separations, and the Output panel of the Export Adobe PDF dialog box
contains the Color Conversion option Convert to Destination (Preserve Numbers). These
settings are CMYK-safe by default.
* It's a good idea to set the document profile to match the output profile, because when these
profiles are identical, there is no need for conversion, so InDesign CS2 leaves CMYK values
untouched. However, if you've set the color conversion to Preserve Numbers, it isn't essential
that the profiles match, because selecting Preserve Numbers prevents conversion of CMYK
color even if the profiles differ.
* It's good practice to use the same color settings file at all points in the workflow, both at the
customer site and at the prepress service provider. If the document is opened and saved on
any workstation where the color settings or policies enable conversion of CMYK colors, the
safe CMYK workflow will be defeated. If a policy warning dialog box appears when you open
an Adobe InDesign CS2 document, click Cancel and consult with the customer to clarify the
conditions under which the document was created. To help ensure the successful implemen-
tation of the safe CMYK workflow, provide workflow instructions and color settings files to
customers in advance. Fortunately, proper setup involves only the few locations listed below,
and if Adobe Creative Suite 2 is installed without altering the default color settings, the steps
are already done for you. The steps below can be used as a checklist in case the settings of any
workstation are unce
See also David Blatner's commentary on it in Real World InDesign CS2 on pp. 666-667.
That's why Adobe calls its use part of a "safe CMYK workflow", assuming your files are in press-ready CMYK. Your CMYK won't be reconverted.
Rick Gordon
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___________________________________________________
RICK GORDON
EMERALD VALLEY GRAPHICS AND CONSULTING
___________________________________________________
WWW: http://www.shelterpub.com
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