Re: Common Standard in UK? Who does the Separations?
Re: Common Standard in UK? Who does the Separations?
- Subject: Re: Common Standard in UK? Who does the Separations?
- From: "Richard Frederickson [Contr]" <email@hidden>
- Date: Wed, 10 Jan 2007 15:02:43 -0500
Thanks for the lead and the warning. Primary blue has a nasty habit
of turning purple in CMYK and that's my major concern with these
images. The ECI ISO webcoated sounds like the safest way to go,
especially if it's endorsed by the UK Periodical Publishers
Association.
Richard
On 10 Jan 2007, at 15:46, Richard Frederickson [Contr] wrote:
I am submitting composited figures to a scientific journal and they
have requested RGB files. Not a problem except that the images are
primary Red, Green, and Blue and they won't reproduce well in print
without some intervention. When I inquired about their ICC profile
for conversion to CMYK, they just responded that it "is not really
relevant"--which has me scared since someone has to do the
conversion and I'm afraid that they're not likely to take much care
doing it.
Hi Richard,
Probably the safest bet is to use the ECI ISO webcoated profile
available at www.eci.org
This is the profile recommended by the UK Periodical Publishers
Association as 'generic' solution. It has a TAC of 300% which makes
it a safer bet than the ECI ISO coated and the Adobe Europe ISO
Coated FOGRA 27 profile which have far higher maximum ink limit
(although some of the high end glossy magazines will of course be
able to tolerate higher TAC than 300% )
A word of warning though , the ECI profiles produce a distinct shift
towards purple when converting saturated blues using the relative
rendering intent ( kind of relevant to another thread running on
this list at present :-) ), so you'll probably be safer using
perceptual rendering , albeit it at the possible loss of some
saturation in certain areas. And of course these profiles have a
set level of GCR.
If you build your own profiles , it might be advantageous to use
the relevant FOGRA data and set a TAC of 320% that still falls
within the PPA spec for many publications , and use a level of
black generation more suitable to your subject matter.
Regards,
Bob Marchant.
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