Re: Dumb question - Printing Colorchecker
Re: Dumb question - Printing Colorchecker
- Subject: Re: Dumb question - Printing Colorchecker
- From: edmund ronald <email@hidden>
- Date: Thu, 27 Oct 2005 03:52:45 +0200
Roger, in the mean time, Danny Pascale has confirmed that my spectral
values and LAB values match the colorchecker tiff aRGB file that I
tried to print. Apart from one square (blue) which may be a
manipulation mistake.
Now how do I print this thing ? The colors look in-gamut when viewing
the profile. Why do the neutral square go blue with abs col and stay
neutral with rel col ? I don't get it ...
Edmund
On 10/27/05, Roger Breton <email@hidden> wrote:
> > How is this best done ? Which rendering and should I be using?
> > Whatever I do, some different thing goes wrong - for instance with
> > relative colorimetric I get very good neutrals but imperfect matches
> > of certain squares, with absolute I get bluish neutrals etc. then
> > there's the question of black point compensation etc .
> >
> > Please help a poor mortal who's hopelessly confused - before I went on
> > vacation I used to know how to do this, now I've forgotten all I knew
> > - or would you please recommend a retirement home, Dr. Alzheimer ?
> >
> > Edmund
>
> In principles, you'd want to use AbsCol. In practice, you may have to edit
> your profile to force the match. In an ideal world, you'd have a true
> unmanaged route to your printer color. Most CMYK devices approach this
> ideal. And therefore lend themselves better to the principles behind color
> management. To me, the more a system deviates from this ideal the less
> chance there are, let's face it, to retain control over the conversion. Do
> keep in mind that, even in an ideal world, there are so much colors that
> your printer can recreate. So you could miss the ColorChecker red or yellow
> or green or blue or cyan because they are too saturated for the printer to
> reproduce faithfully.
>
> One last comment, not all rendering intents are created equal.
>
> Roger Breton | Laval, Canada | email@hidden
> http://pages.infinit.net/graxx
>
>
>
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