Re: Calibration Problems on new Xerox Phaser 7760s
Re: Calibration Problems on new Xerox Phaser 7760s
- Subject: Re: Calibration Problems on new Xerox Phaser 7760s
- From: Joseph Yates <email@hidden>
- Date: Tue, 05 Jun 2007 16:23:33 -1000
- Thread-topic: Calibration Problems on new Xerox Phaser 7760s
>> Shouldn't the PhaserMatch calibration then bring the printer back
>> in line to
>> within a close match of the Lab target values of the printed chart?
>> And thus all 3 should color match since all 3 are being calibrated
>> to the
>> same Lab target values?
>
> No, this is just getting things stable for this particular printer.
> Basically
> linearization and a litte grey balancing
So then the PhaserMatch calibration does a linearization (& grey balance)
for this particular printer and returns it to this "state" day after day (or
week after week) - but NOT necessarily to the same "state" as the other 2
printers.
>> But by examining the exported PhaserMatch measurements I can see that
>> numerically the DeltaEs of each printer are far off from each other
>
> Which is obviouse. You are looking at the readings of the uncalibrated
> engine, not at the calibrated one.
Sorry - should have mentioned that after the 1st PhaserMatch calibrations
were sent to the printers - I printed another target chart from PhaserMatch
- then performed another set of measurements - and saved this 2nd set of
measurements to compare. My reasoning being that this second set of
measurements were from a freshly calibrated printer.
>>> Profiling (once in theory, but depends on your quality requirements)
>>> - printers differ. So there has to be a way to get them into the same
>>> gamut.
>>> - PhaserMatch provides some simple mechanism to create profiles,
>>
>> Actually - PhaserMatch only provides a way to create Device Link
>> Profiles
>> from standard Phaser or Third Party generated profiles.
>
> PhaserMatch 3 included a way to create profiles using an IT/8 and a
> scanner.
> This did not really work as advertised. I was not aware that Xerox
> took this
> out. So yes, PhaserMatch 4 does not have this ability.
You are right - looked at the previous version 3 - and they had the
capability to create a profile with scanner & IT/8 - but now in version 4
(at least Mac version 4) they only have ability to create Device Link
profiles. Need 3rd party software to generate printer profiles.
>>> - PhaserMatch uses a kind of device link profiles, which need to be
>>> generated for each printer separately:
>>> + linearise your printers
>>
>> Right - see my comments above. Not so sure I am trusting the
>> linerization/calibration capabilities of the PhaserMatch software -
>> and thus
>> not sure about the resulting profiles & device link profiles that
>> come in
>> the following steps
>
> To my experience it works
OK I'll have to see if the PhaserMatch calibrations return the individual
printers to the same stable "state" day after day.
>>> + Profile your printers (Phaser1.icc, Phaser2.icc etc)
>>> + Select your simulation profile (like SWOP, ISOcoated v2)
>>> + Create the device link profiles for each printer for this
>>> simulation
>>> (like SWOP_Phaser1, SWOP_Phaser2 etc.)
>>> + Download these Profiles to the printer's memory
>
> There are some things to pay attention to when printing:
> + Image Quality
> - Print Quality: be sure to use Photo only. Other settings produce
> reduced quality
> - Color Correction: none
> Alternatively
> use Automatic and switch off all color correction in "Automatic
> Color Setup"
> (6 items)
> - More Options: all set to 0, you might want to try to activate
> "Apply to CMYK", too
> but I am not sure if it changes things here
> + Paper Feed Options
> - Paper Types: should match your paper closely. Should be same for
> all
> (linearization, target print, profile processing in PhaserMatch,
> production prints)
> - Printing Optimization: Optimize for Speed
>
Yes - we always use "Photo" Print Quality. Have not set the "More Options"
to - Apply to CMYK. Will try that. Paper type is always the same for all
processes. The only thing I have to verify is that Color Correction was set
to 'None' during the calibration - and not the Device Link Profile
(TekColor) correction we created for each printer.
Joseph Yates | Pacifica Island Art | Maui, Hawaii
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