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Re: [BULK] - Re: Match CMYK doesn't work.
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Re: [BULK] - Re: Match CMYK doesn't work.


  • Subject: Re: [BULK] - Re: Match CMYK doesn't work.
  • From: Courtney Schwartz <email@hidden>
  • Date: Mon, 14 Feb 2005 14:44:59 -0500

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.

Courtney Schwartz


On Feb 14, 2005, at 1:44 PM, Roger Howard wrote:


On Feb 14, 2005, at 7:07 AM, Christopher MJ Tangora wrote:

Sorry bout not posting the script...

This problem script was just the default "Match to CMYK" script that came with OS X. I re-ran the script this morning on a number of different formats (jpg, bmp, pdf, png, raw & tif), but the only format that I could get it to work on was TIFF. Is this right? Is the only format you can alter via ColorSyncScripting a TIFF file?

If this is the case, then I might just need to get Photoshop. I was hoping to find a way to do JPEG's and EPS's. Anyways, here's apple's applescript. If it works for JPEG's on someone else's machine can you let me know?

Ahh ok, this makes some sense.

JPEG, BMP, PNG, RAW (?) don't appear to be supported by the OS for CMYK (try generating a CMYK version of these files in Photoshop and opening it in Preview).

CMYK JPEG is not standard, but Photoshop has done it for a long time, so some (few) apps support it.

BMP and PNG don't have any official CMYK support that I know.

PSD and TIFF should work, at very least.

It's not a problem with the script, it's just with what you're trying to do. Photoshop will allow you to save JPEGs as CMYK (and TIFF and PSD of course), but not the others. I'd rethink what you're trying to do and why.

Anyhow, for the normal cases - TIFF output - this script should work fine.

Best,

Roger

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  • Follow-Ups:
    • Re: [BULK] - Re: Match CMYK doesn't work.
      • From: Roger Howard <email@hidden>
References: 
 >Re: Match CMYK doesn't work. (From: Martin Orpen <email@hidden>)
 >Re: Match CMYK doesn't work. (From: Roger Howard <email@hidden>)
 >Re: [BULK] - Re: Match CMYK doesn't work. (From: Christopher MJ Tangora <email@hidden>)
 >Re: [BULK] - Re: Match CMYK doesn't work. (From: Roger Howard <email@hidden>)

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