Digital BW, The Print

--- 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 
> 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