RE: Epson 4900 Calibration
RE: Epson 4900 Calibration
- Subject: RE: Epson 4900 Calibration
- From: Roger Breton <email@hidden>
- Date: Fri, 01 Apr 2011 14:44:23 -0400
Thank's Terry and Steve! You guys are still the best!
Your friendly neighbour, Spiderman -- errr! Roger
-----Original Message-----
From: colorsync-users-bounces+graxx=email@hidden
[mailto:colorsync-users-bounces+graxx=email@hidden] On
Behalf Of Terence Wyse
Sent: April-01-11 1:10 PM
To: 'colorsync-users?lists.apple.com' List
Subject: Re: Epson 4900 Calibration
To go along with Steve's comment below, there's a few things to consider....
* With the Epson Spectroproofer option, it's *possible* to share the spectro
with all printers since the unit comes on and off fairly easy, at least in
the case of the 7900/7890 and 4900 (9900 and 9890 is a beast however and
mostly a 2-person job)......but you would lose much of the convenience of
scheduling auto-calibrations to run during noon-production hours. In any
case, sharing the spectro would help with the inter-instrument disagreement
issue.
* Myself and most of my colleagues that set up these newer printers with the
internal spectros...to a person we almost ALWAYS use them for
calibration-only and almost NEVER use them for actual profiling....we'll use
an off-line spectro such as an iSis or DTP-70 for the actual profiling so
the profile will match on all units. This doesn't totally get around the
issue but it makes sense to me to at least standardize on what spectro is
used for the profile itself ("proof standard" if you will) and simply let
the internal spectro handle the day-to-day calibration needs.
My white-backed or black-backed .35 nanometer cents worth, Terry
On Apr 1, 2011, at 12:53 PM, Steve Upton wrote:
> At 10:06 PM -0400 3/31/11, Roger Breton wrote:
>> Almost ;-)
>>
>> I'm concerned when comparing generations of Epson's printers. I have
>> used 9600s for years now, with GMG and I must say, when I compare my
>> proofs to the newer Epson models, those having newer ink sets, the
>> Ultrachrome K3s, invariably, I'm thrown back by the visual
>> differences I find, all at
>> *comparable* delta Es (well below 1.5 avg and max below 4). These
>> days, I do all my measurements using the iSis (the days of the DTP70
>> are long gone) but I hope to experiment soon with Minolta FD-7. My
>> tests are all done on the same, non-fluorescent substrate. So, the
>> visual difference I observe between prints made with the various
>> Epson generations, ought to stem from the printer's various
>> generations of inks. The typical difference I encounter with the
>> newer Epson inks is in the direction of more red. In comparison, the
>> older 9600's proofs appear yellowish. I remember my days of training
>> at GMG when we had both a 7800 and an Z2100 in the same room, on the
>> same substrate, same instrument, same iterated delta Es, yet the
>> differences between Epson's and HP's was not staggering but quite
>> visible. Shopping for a new printer today, I can't say I'd give my
>> money to Epson blindfolded, as I fear we'll have to expend more magenta
to match the same delta E -- I see it every day with customer's supplied
Epson 9880+ proofs.
>>
>> I was hoping that HP ink technology would offer a different visual
>> quality than Epson's.
>>
>
> I like and appreciate the benefit of on-board spectros in printers but
this visual difference can also be caused by an unavoidable, underlying flaw
of onboards - you can't share a single instrument to profile the devices.
>
> Inter-instrument disagreement is still pretty bad in some cases -
especially when they are different technologies (Pulse vs Munki/i1).
>
> It's also VERY tough to verify the instrument effectively using a color
reference like the Vogelsong and our Maxwell MeasureWatch service.
>
> So, greater ease of use = less control and accuracy. Unfortunate but true.
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