--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Glenn
Mitchell" <gmitchel850@y...> wrote:
HI Mitch,
I'm new to this group and learning a lot. Thanks for the feedback
on my post regarding the FM actions and my frustration with the
metamerism. I didn't mean to imply that Fred's actions addressed
the problem, only that some of his toned pre-sets appear to mask it
to a degree and it appeared less problematic to me. Anyway, it was
the metamerism problem that caused me to go to BO printing for
now... at least until I can afford a RIP or something else comes
along to minimize it.
Regards,
Tony Bonanno
Santa Fe, NM
> I'll respectfully submit this is probably wishful thinking, rather
> than something inherent about Fred's B&W action.
>
> The metamerism results from the wildly nonlinear nature of the
> Ultrachrome inks and the combination of CcMmYKk the Epson driver
> selects.
>
> ImagePrint RIP virtually eliminates metamerism with B&W images by
> avoiding combinations of CcMmYKk that are likely to metamerize.
With
> color images, it uses different profiles for daylight, tungsten,
and
> fluorescent because there just is no way to eliminate the
metamerism
> entirely.
>
> You'd need something more sophisticated than an action to pull off
> what ImagePrint accomplishes, since it's the choices by the Epson
> driver that are a large part of the problem, and you're still
using
> the Epson driver with Fred's action.
>
> You probably notice less metamerism with duotones and tritones
> because those specific combinations of ink may be less likely to
> metamerize.
>
> Metamerism is not a constant for every image. Its effects can
easily
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> vary from one image to the next, because the combinations of ink
> selected by the driver to represent various colors and grayscale
> shades vary considrably.
>
> Cheers,
>
> Mitch