Re: [BULK] - Re: Match CMYK doesn't work.
Re: [BULK] - Re: Match CMYK doesn't work.
- Subject: Re: [BULK] - Re: Match CMYK doesn't work.
- From: Roger Howard <email@hidden>
- Date: Mon, 14 Feb 2005 12:36:33 -0800
On Feb 14, 2005, at 11:44 AM, Courtney Schwartz wrote:
Yeah, it's as Roger says: some of the file formats you want to use are
*inherently* RGB-only. Kind of like GIFs assume indexed color, BMPs
and PNGs assume that they will be displayed on a monitor only. JPEGs
can do CMYK, but some apps will ignore the color rules, making it
effectively useless anyways.
(Plus, if you are doing print, you will probably not want a file
format with compression artifacts and dulled blacks/whites. Those
defects are a lot less noticeable on screen because the light is more
scattered; once printed, they can look pretty bad.)
If you want to be sure that you can use a CMYK profile, you will want
to select a format that is traditionally used in print.
TIFF is one of these. PSD, EPS, and PDF are some that can also do
CMYK. (Note that I say PDF *can* do this; it won't necessarily be all
CMYK if, for instance, you have some images inside it that are RGB.
You'll want to check your flattener/export settings for rules on color
space conversion.)
As an aside, I would recommend Photoshop for a different reason: to
test the results of your script. It has a lot of advanced color
handling, so you will, in theory, be able to see if your script is
giving you the results you want.
Agreed; while it depends on the users needs whether ColorSyncScripting
or Photoshop is better for the automated process, Photoshop is critical
for testing. My objection to Photoshop for automating certain processes
is simply the high overhead (it's slowwwww) and cost - if the
alternatives simply can't do the same job, then of course Photoshop
will be necessary; but in many instances ColorSyncScripting works very
well, and so I'd usually prefer to use it.
Of course, this ignores some color management issues that need to be
considered:
1) Can you really trust an automated RGB to CMYK separation? Many
can't, but many don't. It's up to you to test and be sure.
2) Do you need to get the *exact* results Photoshop will? Adobe uses
it's own CMM in Photoshop and Apple's ColorSyncScripting can't use that
CMM (it uses its own), so results can be different (though it's often
quite subtle, if at all).
3) Martin mentioned how do you handle files with unknown color
spaces... while this is a problem with ANY app you use (Photoshop won't
solve that problem) it's an important question to answer for yourself.
Best,
Roger
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