Re: CMYK/RGB printing confusion - please help!
Re: CMYK/RGB printing confusion - please help!
- Subject: Re: CMYK/RGB printing confusion - please help!
- From: Chris Murphy <email@hidden>
- Date: Wed, 2 Mar 2005 17:39:22 -0700
On Mar 2, 2005, at 5:27 PM, Uli Zappe wrote:
Doesn't it make sense to use Monitor RGB as editing space, if Mac OS X
converts anything into Monitor RGB before printing, anyway? One
conversion less ...
It's a less than ideal situation because Monitor RGB is always changing
if you calibrate/profile your display. If you originate a document in
an editing space, there is no additional conversion over the use of
Monitor RGB (except by Preview). I'm not sure if TIFFany uses Monitor
RGB or if it lets you select an editing space. I'm pretty sure it's
Monitor RGB, so you may not have a choice.
So, apart from the fact that *every* mode produces a blue that's
more or less too dark (and much too dark with every CMYK profile),
the CLJ 5500 profile isn't as bad as I thought; maybe I can indeed
get decent color with a CMYK custom profile. Though I ask myself why
each and every CMYK profile (Apple's own Generic CMYK included) is
so far off with blue?!?
If you create blue in RGB, or an RGB variant, you will be
disappointed with the converted version more than 1/2 of the time.
Blue is a very difficult color to print unless you have blue ink in
the printer (and even then there is still plenty of room for
improvement).
But "In Printer" mode shows that it can at least be printed a whole
lot better than all the CMYK profiles suggest ...
Could be:
1. Crummy CMYK profiles.
2. The profile was made for a printer mode that does a bad job on blues
than the mode used when you send it RGB data.
3. The printer simply does a better job on RGB data overall, than it
does on CMYK data. In which case I'd want to make an RGB profile for
the printer, and make sure OS X normalizes everything to that space
prior to printing.
Chris Murphy
Color Remedies (TM)
www.colorremedies.com/realworldcolor
-------------------------------------------------------------
Co-author "Real World Color Management, 2nd Edition"
Published by PeachPit Press (ISBN 0-321-26722-2)
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