Digital BW, The Print

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "A. Andrew 
Gonzalez" <a_andrew_gonzalez@y...> wrote:

> ImagePrint would be perfect if there is a solution to this course 
> dithering.

I posted some hi-res scanned images of the IP output a
few days ago.  The coarse dithering is a result of
using only a subset of the inkset, which is how they
overcome the UC inks' matamerism.   The Epson RIP does
this also and has the same result.   I'll post some 
scans soon.

Technically, there's no way around it.  All dithering
algorithms represent a tradeoff between spatial resolution
and color (or grayscale value) resolution.  For a given 
ink drop size, the number of different values you can 
create is a function of the area of your dither pattern and
the number of different values or colors of ink you have
to work with.  The RIPs don't use the yellow because 
it's highly metameristc.  This also forces them to reduce
the cyan and magenta because the yellow component of
the "light black" is limited.   With such a limited palette
coarseness is inevitable.  It's a somewhat less extreme
version of why black-only is so coarse - that's a REAL
limited palette - white and black.