Re: RGB to CMYK
Re: RGB to CMYK
- Subject: Re: RGB to CMYK
- From: Denis Gliksman <email@hidden>
- Date: Sat, 3 Dec 2005 23:13:00 +0100
Hello Henk
Thank you very much.
I didn't know the story for Euroscale/Fogra. I just noticed that Photoshop CS2 was using it as defaut for pre-presse europe.
The fact is that trying to have a color management is a pain because nor the client or the people who offstet print doesn't know anything about it.
They don't understand a word, and the client would like the final print look like what they see on my screens ...
Up to know i could resist to go to CMYK, staying in RGB, but they were too many problems" after me" (all the people working after me) so i decided to buy An Epson 4800 printer and some proofing paper to have something going out from here that could look like CMYK print, because all the prints i was doing on my Epson R800 were "too good" and the final image was too far from that ...
As i couldn't get any information from the men in charge of the offset print, was obliged to choose a standart CMYK, knowing it is a world i don't know at all ...
Thanks
Denis
Le 3 déc. 05, à 17:25, Henk Gianotten a écrit :
At 11:58 3-12-2005 +0100, Denis Gliksman wrote:
Hello,
I am a photographer
My work flow is shooting in studio with a D2X, raw files, Adobe RGB.
Nef exported with Nikon Capture in tiff 16 bit.
Retouching and optimisation in Photoshop in Adobe RGB 16 bit.
Up to now my delivery to the client was flat Adobe RGB 8 bit PSD files.
Now my client wants me to deliver CMJN files.
Since we cannot get the profile of the press (long story ...) we decided to deliver standart CMYK, like Euroscale coated V2.
Regards
Denis
Hi Denis,
are you aware that Euroscale is no longer the up to date standard for CMYK output?
Euroscale inks for CMYK are out.
ISO 2846-1 inks are in! :-)
A detailed report on this subject is available from Fogra.
I can send you the PDF, if you like.
Nowadays we focus on the ISO 12647-2 standards for print.
They were established in 1997 and the actual version is ISO 12647-2:2004.
The German Fogra Institute made the characterization data for these standards.
It's called Fogra27, Fogra28, Fogra29 etc.
For sheet fed offset and some heatset web offset fogra27 is the standard for coated and matte paper.
ECI made ICC-profiles to make the CMYK separations.
Adobe made their own profiles, but based on the same Fogra27 characterization data.
The difference is a shorter black that starts at Cyan 35%.
The ECI profiles have a long black with higher Gray Component Replacement percentages.
By using these profiles and the ISO standards for print you are able to realize a larger color gamut.
More information on this subject is available at the ECI (www.eci.org) and Fogra (www.fogra.org) web sites.
Regards, Henk
Denis Gliksman
La Grange Numérique
01 34 87 60 34
06 07 72 75 25
email@hidden
http://www.la-grange-numerique.com
Denis Gliksman
La Grange Numérique
01 34 87 60 34
06 07 72 75 25
email@hidden
http://www.la-grange-numerique.com
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