Re: EyeOne Accuracy for FOGRA Proof Verification
Re: EyeOne Accuracy for FOGRA Proof Verification
- Subject: Re: EyeOne Accuracy for FOGRA Proof Verification
- From: Joseph Yates <email@hidden>
- Date: Sun, 10 Jun 2007 01:05:07 -1000
On 6/9/07 4:57 AM, "Roger Breton" <email@hidden> wrote:
> My experience with the EyeOne is that the Diagnostics is good for catching
> fundamental flaws in the instrument like failing reflectance calibration.
> But it won't detect calibration inaccuracy or drift.
>
Good to know. So how does one check for inaccuracy or drift for these
measuring devices?
> As for its repeatability, it is not as good as, say, the Spectrolino but it
> should be no worse than most X-Rite's instruments.
>
Do you know what kind of tolerance most X-Rite¹s are capable of (especially
EyeOne)?
>
> The fact that you are on the border of failing the Media Wedge tolerance
> (4.6 to 5.4) may tell you that you're too close to the limit for comfort?
>
True but as I stated these measurements are from a Xerox Phaser laser
printer (actually three of them)
and am not really trying to use the results as high end verified ISO proofs.
(Have an Epson 9800 & ORIS ColorTuner for that purpose)
Rather seeing if I can use the Media Wedge (and ORIS Certified Proof &
EyeOne) to color control all three laser printers.
My reasoning being if all 3 printers (after PhaserMatch calibration &
Profiling) can pass the ISO FOGRA verification -
to as tight a tolerance as one can expect a 4 color CMYK toner based printer
to come and then remain consistent & repeatable amongst all 3 printers
I will have a gauge in place to evaluate when to re-calibrate & re-profile.
So far the results are promising
Paper DeltaEs are 1.5 2 (FOGRA <3)
Avg, DeltaEs are 2.5 3 (FOGRA <4)
Maximum DeltaEs are 6-7 (FOGRA <10)
Primaries DeltaEs are 4.5 5 (FOGRA <5)
The Primary patch that is most off is usually Cyan could just be that this
is as close as I can hope this particular Xerox cyan toner will get to
matching the FOGRA tolerance.
Of course I know these tolerances should be (and can be!) much tighter for
other proofing systems but for my purpose they are acceptable.
So knowing the limits and accuracy of the EyeOne instrument will help in
setting tolerances
Joseph Yates | Pacifica Island Art | Maui, Hawaii
>
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