Re: Agfa Sherpa & Epson 10600 profing delima
Re: Agfa Sherpa & Epson 10600 profing delima
- Subject: Re: Agfa Sherpa & Epson 10600 profing delima
- From: Roger Breton <email@hidden>
- Date: Fri, 29 Oct 2004 08:58:50 -0400
> I have been beating my head against the wall trying to profile my Epson
> 10600 running Best XXL to match our offset house's AGFA Sherpa proofer which
> they claim, matches their press.
>
> Let me give you the history and maybe someone can offer some suggestions.
>
> Equipment:
> I use a mac running OS9 with PMP 4 with eye-one to create my profiles. My
> monitor has been calibrated many times using 6500K, 2.2gamma with a current
> lightness of 88, I just redid the calibration. Our printer is the Epson
> 10600UC, rip is Best Remote Proof XXL using Best semi-matte paper 9180.
>
> History:
> We have done all of our own baselin and paper profile measurements for the
> Best 9180 paper with the eye-one. I have profiled the Sherpa using the two
> page charts "ECI2002 CMYK i1 1_2.tiff". I have plugged this profile into
> the rip as the reference profile and into Photoshop as the proof setup. My
> color settings are set to US Sheetfed Coated v2. I get an almost perfect
> onscreen soft proof in photoshop 7 with my proofer.
>
> Problem:
> When the same CMYK file is printed on the Sherpa it is way off. I have
> tried sending both proofers files that have embedded US sheetfed coated v2
> profile, the AGFA Sherpa profile and no embedded profile at all (like the
> test charts have) and they all look identical, none of that makes any
> difference, my proof does not match their proof. All files are CMYK so
> there is no RGB-CMYK conversion in the rips. I do not think this calls for
> profile editor as I get a "perfect" soft proof. I have looked at this
> Sherpa profile and US Sheetfed Coated profile in color eidtor's 3d mapping
> and both profiles are very similar with their own minor peaks in different
> places.
>
> I am at a loss, I cannot see where the problem lies.
Once I worked with a printer who used a Sherpa for proofing. This printer
swore they'd done a press profile and that the Sherpa was simulating their
press. So, in one of my jobs, I slipped in a characterization target from
which I created a profile. When I tried to use that profile for all my
conversions the color looked good on my Epson printer. I was using and still
am BestColor v5. The problem arose when I tried to reconcile MY simulations
TO my printer's Sherpa : there was no agreement. So, in a leap of faith, I
told my printer to ignore HIS Sherpa and instead match my proof. The job
came out just like my proof. It turned out that the printer had NOT profiled
its press and was using some canned Reference profile on his Sherpa. So,
there you have it, a classic case of printer, what, lack of good will?
Ignorance? Bottom line, I never went back to this printer. Instead, I
switched. But I am getting all kinds of other problems with my new printer,
color related. These guys say they simulate a ColorArt on their Epson 9600.
OK, I said. Since I don't have a press profile for these guys I figure I'll
just convert my RGB images to their ColorArt profile, which I did with
PrintOpen v5. Needless to say, perfect screen to match, perfect simulation
on my Epson. Problem arose when I went for press approval: the colors did
not match because they "enjoyed" excessive dot gain: instead of 50% cyan
growing to 70%-72%, it grew to 83%! Black grew to 81% and Magenta to 78%.
Yellow was OK. I refused the job. And they ended up running it on a
different press -- one week later. That press was closer to my expectations.
It turns out that this printer called in a "consultant" who told them their
press did not suffered from a case of excessive dot gain. No, he said, it
was because they did not separate the "optical" from the "mechanical" dot
gain! And once they did that, presumably by using Yule-Neilson, everything
was hunky-dorey! I was so mad when I heard that one. I could not believe
such ignorance was still possible in 2004. Anyway, until this printer tells
me they fixed their stupid problem, which is as simple as changing their
curve on their CTP, I'm not giving them any more business.
Regards,
Roger Breton | Laval, Canada | email@hidden
http://pages.infinit.net/graxx
_______________________________________________
Do not post admin requests to the list. They will be ignored.
Colorsync-users mailing list (email@hidden)
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden