Digital BW, The Print

> 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.

A while back I tried replacing the yellow cartridge with a light black
cartridge to see what the result would be. I printed a few grayscales
and they turned out bright purple, which means that the Epson driver
must be using very large amounts of color to make its neutrals. So I
think the metamerism could simply be a result of the amounts of colors
used in general, not the yellow in particular.

I also tried a few BW prints using the MIS 7600 Archival color inkset in
my 2100. That's their version of the UltraChromes. Those prints also had
metamerism, but different. The prints shifted much more towards blue
than towards green, and the metamerism was just a little bit less severe
with that inkset (but nothing to get excited about).

Making sepia-toned prints have been a common workaround to avoid the
metamerism with the Epson driver, which doesn't really spport the theory
that the yellow is particularly bad.

--
Daniel Staver
http://daniel.staver.no