piezo black (was metamerism confusion)
2001-09-11 by daviddstock@earthlink.net
Maybe the final word on his ink belongs to Jon Cone (from the
Color Piezo newsgroup):
"We have thought about coming out with a more traditional
pigmented BW ink which would incorporate more dye into the
mix; supplied to those who wish to print on glossy materials. But
longevity of such an ink would be compromised in favor of
compatibility with more traditional looking photo gloss materials.
Our current BW ink, being a very heavy and concentrated pigment
base is just too dense for gloss materials (and we have had the
best minds in paper development working on alternative gloss
technology to no avail...)
Pros and Cons:
Pros of a dye in a pigmented ink, is tinting strength as it reflects
back less white light than pigment - it appears darker or more
saturated to the eye. It allows for customization of a
monochromatic ink. If heavy in presence will allow printing on
gloss coatings and allow for greatest paper compatibility.
Cons of a dye in a pigmented ink: metamerism, reactions to
paper coatings disproportionate to their presence (i.e the
chemical compound of the dye molecule and the coating mix
produce a reaction - this can occur whether lots of dye or trace
dye.
--
Jon Cone"
Jon had perfectly good reasons for going with pure
pigment--deciding, that is, not to use a black ink that "appears
darker or more saturated to the eye." How critical the difference
in apparent blackness is to an individual printer is a subjective
matter. The fact that the difference exists seems indisputable.
I'm still very interested in seeing samples of the deepest blacks
people have produced with Piezography inks, using white matte
fine art papers. I'd be happy to pay for them. I'm not actually a
fanatic about these things--I'm just looking for the best ink/paper
combination for my work.
--David