Re: Creating a SWOP proof with an Epson
Re: Creating a SWOP proof with an Epson
- Subject: Re: Creating a SWOP proof with an Epson
- From: Terry Wyse <email@hidden>
- Date: Sat, 15 Jul 2006 11:01:48 -0400
On Jul 14, 2006, at 7:40 PM, Martin Orpen wrote:
Our own proofs have rarely exceeded 2.2dE - but it's much easier to
control on a 9600 than on a press.
Is that 2.2 dE figure comparing the proof to itself or to the
colorimetric data it's supposed to be matching? In my opinion, a
proofer can and should be held to < 1 dE to it's original reference
data. In other words, a proof should not drift more than 1 dE from
it's original starting point.
If this 2.2 dE value is instead a comparison of the inkjet proof to
the press characterization data it's supposed to be simulating, then
2.2 dE is not altogether unreasonable, however in my experience an
"exact" match visually generally doesn't occur until you get under
around 1.5 dE or so, especially when evaluating neutrals (and "exact"
match visually is when all parties viewing the proof can't agree on
what they are seeing as the difference - when measured, that usually
occurs around 1-1.5 dE in my experience).
If it was me, I'd be looking for system that can get AT LEAST 1.5 dE
average from proof-to-press. Personally, I've not seen ICC-based
proofing systems that can consistently get under that figure and keep
it there by means of re-calibration/linearization. On the other hand,
I've seen a couple of non-ICC iterative approaches that can easily
get under .75 dE and even half of that (.35-.50) given premium media
and a decent proofer (these days, that's pretty much an Epson x800
series printer) and, more importantly, maintain that figure
consistently via re-calibration.
Regards,
Terry Wyse
_____________________________
WyseConsul
Color Management Consulting
G7 Certified Expert
email@hidden
704.843.0858
http://www.wyseconsul.com
http://www.colormanagementgroup.com
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