Re: Colorsync-users Digest, Vol 4, Issue 369
Re: Colorsync-users Digest, Vol 4, Issue 369
- Subject: Re: Colorsync-users Digest, Vol 4, Issue 369
- From: MSP Graphics <email@hidden>
- Date: Mon, 15 Oct 2007 09:12:09 -0700
Message: 8
Date: Mon, 15 Oct 2007 10:26:53 +0200
From: Thomas Holm/pixl <email@hidden>
Subject: Re: Recommendations for Spectro and Profile
To: MSP Graphics <email@hidden>
Cc: email@hidden
Message-ID: <email@hidden>
Content-Type: text/plain; charset=ISO-8859-1; delsp=yes; format=flowed
On 13/10/2007, at 22.43, MSP Graphics wrote:
But those numbers do make for good sales copy. mind you, I can
get those
numbers on the day I perform the service, but when I turn my back...
But here's exactly the crunch: On the HP Z printers (with a GMG rip
at least) it doesn't require ANY degree of intervention or knowhow.
Once the system is set up, it's fully automated. I've installed
around 40 of the HP Z printers most of which is using GMG and we
routinely hit an average dE of less than 0.5 and a peak in the
1.1-1.3 area on GMG printer to printer (or printer to the standard
printer calibration MX3 profile really). Fully automated.
This translates to around 0,9-1.3 Average deviation from Fogra
39/28/29 with a max. deviation of around 2-3 measured with an Eye one
(several really and have also checked with a newly calibrated
spectrolino) on a Fogra media wedge. PRimary colors rarely deviate
more than dE of 2.
Yes, the latter are realistic (and perfectly satisfactory) numbers,
which we routinely get on the Epsons and maintain with minimal
intervention. What concerns me is what appears to be an ever-
escalating war of numerical claims on DeltaE that relates more to
salesmanship than to practical needs. Some of the most recent
statements about this on this forum relate to differences that will
not be visible in any proof, and even those very slight differences
are dwarfed by the variability within a press run, let alone multiple
runs . At this point (IPA proofing Roundup results show) all the
major proofing RIPs (EFI, GMG, ORIS, etc.) are giving outstanding
results (even better than we need) with the main differences relating
to ease of use and cost (including, by the way, consumables, with
certain companies locking customers into extremely costly proofing
paper--not a trivial consideration for many customers).
I have one customer who requires that his 3 printers visually match
under a light-booth. He used to have 3 Epsons (7600 and 9600) in an
air-conditioned/humidity controlled room (where the ink and paper are
also stored) and he ended up re-calibrating the printers about twice
a day (with an ICColor and GMG). Now with GMG/HP Z2100 it's
automated, and every other day no calibration is performed - and they
have a better match than they ever did on the Epsons.
Yes, that's nice, though there's no reason why the Epsons can't be
extremely consistent if they are recalibrated from time to time. Of
course that process is easier on the HPs. There is some resistance
here to the HPs for proofing, with many having come to rely on and
trust the Epsons--service has been a factor. We're now also getting
disturbing reports of failure of the onboard spectro system (one
major RIP manufacturer is now steering its customers away from the Z-
series for this reason). The Epsons also still produce a sharper dot,
which helps if the customer has a dot-proofing RIP like Compose or
EFI's1-bit TIFF option. Some of the advantage of the HP's onboard
calibration feature is offset by the perception that an occasional
visit from the reseller/service provider has many benefits, which
include but aren't limited to a proofer recalibration. Frankly, I'd
like to see both better day-to-day process control AND periodic
(preferably scheduled) professional intervention.
By the way, an easy procedure, available on any RIP that supports the
Z-Series, is to simply start the calibration before one leaves at the
end of the shift--not very hard.
Best Regards
Thomas Holm / Pixl Aps
- Colour Management Consultant
- Seminars speaker and tutor on CM and Digital Imaging etc.
- Apple Solutions Expert
- Member, ColorManagementGroup.com
- www.pixl.dk ยท email@hidden
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