Re: RGB - CMYK
Re: RGB - CMYK
- Subject: Re: RGB - CMYK
- From: "Richard Frederickson [Contr]" <email@hidden>
- Date: Tue, 28 Feb 2006 08:20:59 -0500
Title: Re: RGB - CMYK
Traditionally, printers speak CMYK and their workflows developed
around that.
>A Colour Management workflow is all
about removing all the things that
go wrong between the client brief, the
graphic designer, the photographer, the hardcopy proof prints, soft
proofs and whatever else......
One of the things that "do go wrong" is RIPs that don't
interpret embedded profiles, leading printers to ignore them. In all
the seminars and workshops I've attended, they have all said do not
include profiles with CMYK images. And when you think about it, it
does make sense since once it is in CMYK its in the device colorspace
and you would not want to edit an image in that space anyway.
I work in an environment where we have no access to the final
print house and they usually insist on CMYK
files. We've had pretty reliable success previewing our RGB
images in SWOP and adjusting them accordingly; then use Convert to
Profile to generate the deliverable CMYK file. It's not ideal, but it
works.
Interestingly, with more online publishing going on, many of our
publishers are asking for RGB images. Which begs the question--who is
going to take more care in performing the RGB to CMYK conversion, me
or someone with no vested interest in the outcome?
Just one of the guys in the trenches,
Richard
Richard Frederickson
[Contractor]
Senior Technical Specialist
Scientific Publications, Graphics &
Media (SPGM)
SAIC-Frederick, Inc.
National Cancer Institute at
Frederick
Frederick, MD 21702-1201
(301) 846-1546
Visit us at
http://web.ncifcrf.gov/spgm
[LD:]
I have heard, over and over, from many people, including printers
themselves, that many or most printers, including good printers,
don't
use color profiles.
Is this true? If so, why not?
Somehow, I had gotten the idea that a primary reason for using
color
profiles was so you could get better print work. But if
large presses
don't use them, then I'm definitely misunderstanding something.
------------------------------------------------------------------------
[PL:]
>A Colour Management workflow is all
about removing all the things that
go wrong between the client brief, the
graphic designer, the photographer, the hardcopy proof prints, soft
proofs and whatever else......
I didn't plan to take RBG files to a printer. I thought
there were color profiles for CMYK files too. Aren't
there?
When I ask a printer what profile he would like his CMYK files in, and
he tells me he doesn't use profiles, how do I then produce a file that
prints properly on his press? (Without running a
dozen proofs, because publishers have told me it will be a cold day in
hell before they allow the author more than one proof before going to
press). I feel I am getting close to the mystery, but not
quite there. What variables make for a good file? Is
there some generic format for all litho presses?
>Given a correct digital file the litho printer should produce a
good job for you.
I guess I don't understand how one achieves the correct digital file,
if it's not part of color management and if all presses don't want the
same thing.
I assumed that the color profile was helpful to them, but clearly they
need something else. What?
What exactly DO people do to their files, other than convert them into
CMYK (which I gather is an art in itself), if they want good color
from the press?
ack.
Thanks,
Liz
---------------------------------------------
Liz Day
Indianapolis, Indiana, central USA
(40 N latitude, USDA zone 5b)
www.kiva.net/~daylight
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| References: | |
| | >RGB - CMYK (From: Liz Day <email@hidden>) |