Re: Eye-One factory recalibration and Xrite Support
Re: Eye-One factory recalibration and Xrite Support
- Subject: Re: Eye-One factory recalibration and Xrite Support
- From: Roger Breton <email@hidden>
- Date: Sat, 12 Jul 2008 09:26:13 -0400
Edmund,
I wish I would have visited Regensdorf Gretag offices in Switzerland.
With regards to X-Rite, Techkon, Minolta, Datacolor, Barbieri, Avantes,
OceanOptics and all instrument manufacturers ever agreeing with one another,
one day, on some sort of common color references, what beats me in all of
this is that all the national labs these companies claim they are traceable
to, NIST, PTB, NRC, are *all* traceable to each others within fractions of
deltaEs, and they are fighting to reduce the uncertainty to which they are
all traceable to each other all the time! As far as I know. So, you see,
there would be no need for an outsider like to come in and try to police
these people since they already police each other on measurement procedures
all the time. You should see scientists at these international color
conferences, bragging about their latest colorimeter designs and how they
managed to reduce the uncertainty down to 0,00001234%!
There's got to be some other reasons for the discrepancy...
> When I was still a blogger, before I started doing my own color stuff,
> I one day visited Gretag Regensdrof headquarters, and was told that
> this gentleman over there was a *Color Scientist*. Deep in awe I
> requested whether I might ask a question of this specialist.
>
> "Sir, what is the ultimate standard to which your spectros are calibrated" ?
> "They are calibrated to match the first handheld instrument we designed".
> After this, we did talk of tiles etc - at the time it was over my head.
>
>
> I agree with Roger that more cooperation in the industry would be a
> good thing to ensure better inter-instrument matches. I'l sure the
> appropriate standards body would be happy to see him participate. When
> I saw problems in my daily practice with camera color, I made
> enquiries and began to participate in the ICC process.
>
> Edmund
>
>> I thought BCRA tiles were the best, all around, absolute color references in
>> the world today. Always thought they were. How could it be otherwise, right?
>> Until I found out how X-Rite and Techkon have sets of their own, both
>> traceable to their respective national calibration bodies, NIST and PTB
Roger Breton
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