Re: Eizo CG 21 and White Point...
Re: Eizo CG 21 and White Point...
- Subject: Re: Eizo CG 21 and White Point...
- From: Roger Breton <email@hidden>
- Date: Wed, 11 May 2005 12:02:44 -0400
> I have read the other responses to this thread and thought to throw in my 2
> cents. The discussion over which calibration white point to use must consider
> the ambient lighting of your viewing environment, the type of light box you
> are viewing your hard copy proof in (we prefer a dual iluminant light box like
> the GTI SOFV-1ex), and especially the white temperature of the proofing paper
> itself. One single white point temperature, whether it's D50, D65, or
> somewhere in between, is not sufficient to accomodate a flexible softproofing
> workflow of any usable specificity. We work with multiple magazines so this is
> important to us.
You're lucky you can proof to the ultimate printing paper you use in your
group. Do you have that much control over the specification of the stock of
paper you use in your group for your various publications?
> We have multiple users set up in our Mac OS X configuration and we switch
> between them via Fast User Switching.
So none of your monitors are 'hardware' calibrated?
> I have each user calibrated to a
> different white point, user A is set at 5300K, user B at 5400K, user C at
> 5800K, and so on.
What kind of CIE LAB values do each of your proofing stock measures that
visually correspond to these CCTs, if I may ask?
And, in terms of calibration, you end up using 'native'?
What about ambient light levels?
> We arrived at these by visual testing of the monitor paper
> whites against the actual proofing stocks in the GTI light box.
Sounds like Don Hutchison's methodology.
> We found we
> get a much greater degree of accuracy and specificity this way.
I don't suppose you end up switching 'simulate paper white' on ever, but
what about 'ink black', how do you calibrate your black points, any specific
luminance targets? What about white point luminance?
> The monitor
> white point needs to be visually confirmed against the proofing stock under
> your optimized viewing conditions.
So, come a change in your your printing or proofing stock and you have to
redo the whole exercice. But you must have already assessed the stability in
your proofing stock?
Regards,
Roger Breton | Laval, Canada | email@hidden
http://pages.infinit.net/graxx
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