Re: EFI ColorProof Ink Limit
Re: EFI ColorProof Ink Limit
- Subject: Re: EFI ColorProof Ink Limit
- From: Roger Breton <email@hidden>
- Date: Tue, 21 Aug 2007 08:32:58 -0400
Soren,
Here's my analysis -- I could be wrong.
> Cyan:
> Chroma 60,0 = Density 1,29
> Chroma 56,0 = Density 1,41
Increasing the density on the cyan results in lower chroma. Do you see that?
> Magenta:
> Chroma 68,9 = Density 1,19
> Chroma 65,0 = Density 1,48
Again, increasing the density on the magenta results in lower chroma. On
strict "gamut expansion" ground, IMHO, ignoring Graeme's excellent point
yesterday, one would ignore the density completely and limit ink based on
the maximum attainable chroma. Even on a printing press, printing at higher
densities does not automatically affords higher chromas.
> Yellow:
> Chroma 105,8 = Density 1,44
Here, I can't really comment.
> In both Cyan and Magenta you "drop" a lot of density by limit at chroma
> values. Yellow seems to follow each other along (chroma and density). Is
> there not a risk you will limit the gamut doing this? Blue-Purple area for
> example.
It's possible that higher ink densities for cyan and magenta, for example,
in COMBINATION, result in higher chroma for the blue but I have not tested
this personally.
Best,
Roger Breton
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