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Re: FOGRA52 & i1Profiler [subject corrected]

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Re: FOGRA52 & i1Profiler [subject corrected]

Subject: Re: FOGRA52 & i1Profiler [subject corrected]
From: Martin Orpen <email@hidden>
Date: Sat, 9 Sep 2017 12:15:53 +0100

> On 9 Sep 2017, at 08:08, Graeme Gill <email@hidden> wrote:
>
> colprof -v -qm -kz fogra52
>
> icclu -fb -ia fogra52.icc
> 100.0 0.0 0.0 [Lab] -> Lut -> 0.007017 0.000764 0.081098 0.000000 [CMYK](clip)
>  50.0 0.0 0.0 [Lab] -> Lut -> 0.606688 0.510562 0.654812 0.000731 [CMYK]
>  40.0 0.0 0.0 [Lab] -> Lut -> 0.695956 0.650859 0.853761 0.179810 [CMYK]
>  30.0 0.0 0.0 [Lab] -> Lut -> 0.791740 0.543053 0.444419 0.844733 [CMYK]
>  20.0 0.0 0.0 [Lab] -> Lut -> 0.998257 0.923926 0.930881 0.996716 [CMYK]
>  10.0 0.0 0.0 [Lab] -> Lut -> 0.994710 0.972349 0.899008 0.998990 [CMYK]
>   0.0 0.0 0.0 [Lab] -> Lut -> 0.983620 1.000000 0.915429 1.000000 [CMYK]
>
> what exactly are you looking for ?


Yellow in separations with increased K generation :)


In profiles I made using Argyll in March this year I was getting this from  -kx
300 TAC

60.000000 0.000000 0.000000 [Lab] -> Lut -> 0.042220 0.021155 0.138908 0.493434
[CMYK]
50.000000 0.000000 0.000000 [Lab] -> Lut -> 0.082952 0.039821 0.172168 0.656604
[CMYK]
30.000000 0.000000 0.000000 [Lab] -> Lut -> 0.703806 0.399562 0.299396 0.917587
[CMYK]
20.000000 0.000000 0.000000 [Lab] -> Lut -> 0.910211 0.696531 0.426875 0.996719
[CMYK]
10.000000 0.000000 0.000000 [Lab] -> Lut -> 0.932469 0.806219 0.293490 0.998988
[CMYK]
0.000000 0.000000 0.000000 [Lab] -> Lut -> 1.000000 0.864791 0.135001 1.000000
[CMYK]



But, more importantly, this is what you actually get from relative conversions:

50.000000 0.000000 0.000000 [Lab] -> Lut -> 0.103877 0.046326 0.000000 0.712330
[CMYK]
30.000000 0.000000 0.000000 [Lab] -> Lut -> 1.000000 0.531888 0.077466 0.945821
[CMYK]
0.000000 0.000000 0.000000 [Lab] -> Lut -> 1.000000 0.864791 0.135001 1.000000
[CMYK]


And perceptual has NO yellow whatsoever!

50.000000 0.000000 0.000000 [Lab] -> Lut -> 0.078745 0.037454 0.000000 0.635533
[CMYK]
30.000000 0.000000 0.000000 [Lab] -> Lut -> 0.265519 0.116809 0.000000 0.776893
[CMYK]
0.000000 0.000000 0.000000 [Lab] -> Lut -> 1.000000 0.549650 0.000000 0.922678
[CMYK]


--
Martin Orpen
Idea Digital Imaging Ltd
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- Re: FOGRA52 & i1Profiler [subject corrected]
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References:
	>Re: FOGRA52 & i1Profiler [subject corrected] (From: Martin Orpen <email@hidden>)
	>Re: FOGRA52 & i1Profiler [subject corrected] (From: Graeme Gill <email@hidden>)

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