Re: FOGRA52 & i1Profiler [subject corrected]
Re: FOGRA52 & i1Profiler [subject corrected]
- Subject: Re: FOGRA52 & i1Profiler [subject corrected]
- From: Claas Bickeböller <email@hidden>
- Date: Mon, 11 Sep 2017 17:27:23 +0200
Martin,
>
> These are CMYK separations to various profiles built using the FOGRA52.txt
> data (and a couple using the 47L data).
Source were the RGB originals?
Which rendering intent did you use?
I assume relative colorimetric?
Then it’s no surprise that you see a different behavior compared to profiles
made from FOGRA39, 47, 29, 27 etc data.
They do all have a very similar white point, your test images are mostly in
gamut and thus a relative colorimetric conversion leads to similar results.
FOGRA52 has a blue whitepoint (reflecting real life uncoated stock!) and thus
relative colorimetric conversions lead to bluish grey.
> Proofs simulate FOGRA52 on matte OBA media using a SureColor P5000 with the
> violet ink set.
>
> For the sake of argument, let’s say that I like BVDM’s Mr Low Key when we
> convert from ECI RGB to the ECI's PSO Uncoated v2 profile.
>
> If I create an ICC profile from the FOGRA52.txt data using *any* of the
> software tools that I have at my disposal, including Argyll, I cannot match
> Mr Low Key.
>
> All variants result in an image that is far too blue.
if using relative colorimetric, correct?
>
> [GMG’s ColorServer conversion will get closest,
because you are using a perceptual mapping then….
> but this isn’t an ICC solution and I can’t rapidly manufacture new profile
> variants as quickly as I can with our other software solutions.]
>
> Matching Mr Low Key hasn’t been an issue in 39, 47, 45, 29 etc etc. —custom
> profiles made from original data files don’t differ much from the generic ECI
> or PS profiles.
>
> For the sake of argument, let’s also say that I definitely don’t like the ECI
> version of Mr Midtone or Ms High Key… especially their skin tones… which
> don’t look right at all.
>
> Regards
>
> --
> Martin Orpen
> Idea Digital Imaging Ltd
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