Eye-One diagnostics
Eye-One diagnostics
- Subject: Eye-One diagnostics
- From: Martin Orpen <email@hidden>
- Date: Thu, 13 Apr 2006 23:49:23 +0100
Anybody have experience of how good the Eye-One diagnostic software is?
We unwrapped a fresh Efi re-badged Eye-One this week to use for FOGRA
proof validation. The proofer calibration had been carried out with a
DTP70 and we were down to average dE readings in the 0.6-0.8 range
for the ECI Visual target using an Epson 9600 and FOGRA stock.
Assuming that validation would be simple with those tight tolerances,
we were shocked that it failed every time using the Eye-One - with
big discrepancies of over 2 dE on paper white alone! After wasting
lots of time checking and rechecking our measurements we got hold of
a number of approved proofs from a recently certified print shop and
all their proofs failed too :-(
The Eye-One was swapped for a borrowed unit and all the proofs passed
- exactly as expected.
We downloaded and ran the diagnostic software on the faulty unit and
it passed! The unit and the calibration tile have the correct serial
numbers etc. We also checked to make sure that both the original and
the borrowed units are non-UV.
I've never used the Eye-One apart from the odd monitor calibration
using borrowed units, so was a bit surprised by the flakiness of the
device on our first serious use. Surely the diagnostic software
should have spotted the problem? The L values for the paper readings
were way out - as if the internal light source was too dim.
Amazing how much time these sorts of problems can waste - and
shocking that such a poorly performing unit can pass a diagnostic test.
--
Martin Orpen
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