Re: Accuracy of Instruments
Re: Accuracy of Instruments
- Subject: Re: Accuracy of Instruments
- From: Klaus Karcher <email@hidden>
- Date: Fri, 02 Nov 2007 20:45:23 +0100
Mike Strickler wrote:
Wait a minute: "In all probability"? The "expert eye"? And "I guess"?
Would you please be so kind to /not/ truncate quotes beyond recognition?
... but back to the facts:
The University of Wuppertal, the University of applied Sicences
Stuttgart and the FOGRA carried out an investigation about
inter-instrument differences between 8 instruments of 5 manufacturers
and presented the results at the 4. Digitalproof-Forum 2004 in Stuttgart.
The probes (BCRA tiles, digital proofs and offset prints on APCO paper)
were measured with a reference instrument before and after the test to
eliminate probes damaged during the test.
They result of the investigation was a Delta E 76 of up to 2 to the
average on 95% confidence level. I think one can argue in good
conscience that these differences are visible and significant in process
control and quality management.
Klaus Karcher
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