Re: FOGRA52 & i1Profiler [subject corrected]
Re: FOGRA52 & i1Profiler [subject corrected]
- Subject: Re: FOGRA52 & i1Profiler [subject corrected]
- From: Andreas Kraushaar <email@hidden>
- Date: Sun, 10 Sep 2017 10:01:57 +0200
Hi all,
let me provide my two cents:
a)
first all the work behind a Fogra standard is mostly based on an idealistic
background without invoicing anyone. We heavily ask for contribution and
discussion throughout many channels (mostly:
email@hidden
and
email@hidden
It is quite hard to motivate many people to participate early in the process.
If people later kicks in …
b) the colour accuracy is given perfectly. So take a good given CMYK PDF and a
corresponding print on an uncoated stock. If you proof the data with F52 and a
mechanical rough proofing substrate you will get a visual match that was never
available in the industry before (for this kind of stock).
c) from separation point of view here the bluish white point (and the
corresponding grey balance) introduces some challenges for ICC workflows. This
is based on the used CIEXYZ white point scaling, which moves all colour to the
new white point and takes all colour with it (as defined per the pertinent
ratio). Here the prediction is too bluish compared to what people would prefer
to have seen neutral on the press (a little more yellow). So the („here not
very visual plausible") computed CIEXYZ values are met perfectly with the used
profiles - but this corresponds to a not perfect separation. See the example
provided from Juergen Seitz.
However we see this not for 80% of the use cases but for some high quality
demanding customers that now need to optimise their colour server color
transforms. This is something you can expect from distinguished prepress house.
You cannot solve this problem with V2/V4 compliant ICC profiles!
regards
Andy Kraushaar
Register for the Fogra colour management symposium 2018 !
Our quality, neutrality
------------------------------------------------
Dr.-Ing. Andreas Kraushaar
Dept. Prepress
Forschungsinstitut für Medientechnologien e.V.
Fogra Research Institute for Media Technologies
Einsteinring 1a
85609 Aschheim near Munich
Telefon: +49 89. 431 82 - 335
Telefax: +49 89. 431 82 - 100
E-mail: email@hidden
Internet: www.fogra.org
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> Am 09.09.2017 um 18:59 schrieb Graeme Gill <email@hidden>:
>
> Martin Orpen wrote:
>
>> The profiles from the 52 data aren’t useable.
>
> Seems to me then, that the data isn't usable - the profile merely
> represents the data. Either that or something about how you are
> trying to use the data-set/profile is out of sync with what it is
> intended for.
>
> Graeme Gill.
>
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