QTR-Quadtone RIP

rossfmj <ross.jarvis@...> wrote:

> **
>
>
> ...
> I am using the Cyan Position Neutral Cool Photo Black to set the initial
> ink limit and am using the Light Cyan, Neutral Cool Light Black as the grey
> ...
>
...
> As mentioned I have set the DEFAULT_INK_LIMIT= to values from 70% down to
> 45%, each and every time I get the same result at the linearisation stage,
> approx 90% gives the highest density (actually from 2.19 to 2.38 depending
> on ink limit settings) and 95% and 100% are declining values.
>
OK.  The next thing to consider is that an LK density ink will often
actually have a higher dmax than PK.  But, it will do so with such a high
load that the paper will be too wet, causing other problems, like increased
pizza wheel marks.

So, measure the LC (a neutral LK) densities on the 100% calibration mode
print and set an ink limit for the LC that is such that the density is
about 50% of the PK ink limit density.  This should stop the combined LC +
C from being higher than the C density at it's dmax.

Basically, you may need a much lower ink limit on the LC.

Paul
www.PaulRoark.com


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