The way I understand it, 4-color printers use the three primary colors to
produce a photo black (which is not a true black) and the pigmented black
is used only to produce laser-like text because it is not compatible with
the die-based colors.
6-color printers have a photo black which is compatible with the die-based
colors and therefore do not have to combine colors to produce a black. As a
consequence, some feel they do not produce text as well as printers with
pigmented black cartridges. These two types of black inks are not
interchangeable!
..
"SleeperMan" <(E-Mail Removed)> wrote in message
news

r1zc.4775$(E-Mail Removed)...
> coinman1 typed:
>
> > I have used them interchangeably between my i950 and MP730 without any
> > noticeable difference so I think they are identical in their
> > chemistry and color. The blacks, however, are different since one is
> > dye base and the other pigment base and are, therefore, not
> > interchangeable.
> >
> > "josh" <(E-Mail Removed)> wrote in message
> > news:gJFyc.19854$(E-Mail Removed)...
> >> Anyone know the difference between the c-m-y color versions of the
> >> Canon BCI-3e and BCI-6 cartridges?
>
> Which one is better - dye or prigment one?
>
>