Digital BW, The Print

I also found Antonis's  linearization tutorial very informative and  
helpful.  I haven't seen any metamerism in sepia prints I've made using  
IJC/OPM or QTR profiles that employ K, LK, LM, and Y inks only with  
very small amounts of the yellow and light magenta used for toning.   
Perhaps the metamerism is more dependent on ink load, rather than just  
the yellow ink.

Carl
On Sunday, July 6, 2003, at 02:37  AM, Roy Harrington wrote:

>
>
> Antonis,
>
> I enjoyed your description of the IJC linearization and the issues  
> found.
> I don't own a 2200 but Carl Schofield has done some work on the curves
> for it using QuadToneRIP.  During that, we also ran into the issues of
> adding light-cyan and light-magenta to neutralize the tone.  In fact I  
> think
> trying to compensate for the added density was the major effort in the
> cool curve.  Carl also had some nice plots of density. See:
>
> http://harrington.com/QTR-2200.pdf
>
> I see you did some sepia curves lately, did you notice much metamerism
> in those prints?   All along the yellow ink seems to have been blamed
> for metamerism -- I wonder how true that is.
>
> Roy
>
>
>
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