QTR-Quadtone RIP

wolverinemsu <bowlby@...> wrote:

> **
>
>
> ... R1800 with MIS Ultrachrome inks ...
>


> My question has to do with how to offset the "a" and "b" values to achieve
> "truly" neutral grays. ...
>

If I were profiling that printer, I'd make a good carbon core or backbone
profile first.  Then to cool the carbon, I'd use C and M in equal parts to
pull the Lab B into place first.  Then for Lab A  I'd use C and M in
offsetting moves.  THat is, if I wanted higher Lab A I'd increase M one
unit and decrease C one unit.

That is basically how I profile with the dilute carbon core and LM & LC in
this inkset: http://www.paulroark.com/BW-Info/4000-6K-Plus.pdf    The
approach works well and is actually rather easy.

Once you get into the other colors, things will get more complicated.  I
can't help you there.  I'd recommend you take the easiest route first.

Paul
www.PaulRoark.com


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