Re: Colorsync-users Digest, Vol 5, Issue 207 GCR
Re: Colorsync-users Digest, Vol 5, Issue 207 GCR
- Subject: Re: Colorsync-users Digest, Vol 5, Issue 207 GCR
- From: Henk Gianotten <email@hidden>
- Date: Sun, 15 Jun 2008 18:41:08 +0200
Hi Roger,
In Europe the ECI-profiles (generated from the fogra39 characterization data)
have a substantial amount of GCR. Lots of printers (and designers) switched
to the "7000 version" and experienced the advantages of these profiles.
Some others created profiles with equal (or even more) amounts of GCR.
In the beginning, printers expected that they would have far less latitude
to correct images in color. Some "experts" did them believe that images
with lots of GCR could not be manipulated on press.
In my opinion you have far better tools to compensate these harmonized
GCR separations. Changes in C, M or Y don't influence the neutral parts.
Color is still available and (for example) an orange color can be corrected
far easier because the printer can change M and Y and does not run into
the usual problems in neutral tones.
Yes, I expect that some form of GCR will be used in four-color printing.
Both in offset, silk screen and (even more important) digital print.
Most suppliers of digital print systems will introduce DVL-technologies
to correct non-harmonized files. By using GCR they get a far more stable
process and that's what the print buyers want.
And several sets of profiles with certain amounts of GCR will be used
depending on process and image content.
Some printers will continue to tell horror stories on GCR applications.
Let them do; some don't know that they already print CMYK-sets
prepared with a substantial amount of GCR (like ISOcoated).
It takes some time, but they will learn.
I think,
regards, Henk
At 10:01 15-6-2008 -0400, Roger Breton wrote:
Hi Henk,
So, in your opinion, some form of "GCR" will become more and more
fashionable in the printing industry as a whole, over time? For the better?
Regardless of the subject matter?
I'm just not convinced that GCR, in general, is so superior to UCR that we
should separate all images with that technique. Granted for neutrals kinds
of subject, it is the better choice, as in silverware and four color blacks.
But for portraits, I would hesitate.
Besides, hasn't it been said that GCR affords less color control on press
than UCR? I understand for those presses that are fine tuned to a certain
print condition, that have an incredible hit rate in terms of being able to
match the proof, that GCR may help without hindering the press color
control, because it does not need all that color control if it's able to hit
the proof very well. But for those shops that don't use an exacting setup,
inks a little too far from ISO tolerances, and that are given wide proofs
variability, I think GCR would be a suicide.
So, my verdict it, yes, I think it's possible, to some extent, but the right
conditions better be in place before jumping into it.
BTW, as far as ink savings is concerned, just switching from AM to FM
screening automatically affords the printer double digit ink savings.
> Hi Roger,
> Yes I agree, run length decrease but machine costs increase so productivity
> must increase too. Fast machines need to have a short set up time, good
> plates and a stable print process. One can improve this process by
> harmonized color separations with controlled TAC and GCR.
> I have seen several high-speed machines in operation for magazine
production.
> They can meet the top speed if the ink presetting is correct and the plates
> are
> top quality.
> Henk
Roger Breton
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Henk Gianotten, Prins Hendriklaan 58 3761 DW Soest, Netherlands
Tel. +31 (0)35 60 12 206 Fax: +31 (0)84 73 04 497 e-mail: email@hidden
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