QTR-Quadtone RIP

--- In QuadtoneRIP@yahoogroups.com, "Philip Schwartz" <pschwart@...> 
wrote:
>
> My workflow:
> - create ink profile in QTR
> - select curve and print 21 step tablet
> - measure steps after dry-down using X-Rite 810
> - enter measured values into QTR linearization array and 
regenerate curve
> 
> Problem:
> Steps never achieve the ideal density for the measured dMax.
> When I linearize using Photoshop transfer curves, I can get within
> .01 for all steps, but I am often off by at least .05 - .10 in
> multiple steps when I linearize using QTR. Multiple iterations 
through
> the process don't improve matters; things often get worse. 
> 
> Can anyone shed some light on this? I assume I should be entering
> *measured* values into the linearization array, and not *derired*
> values. Too bad QTR doesn't present the interpolated curve and let
> users edit it directly ...

.
.
When you create the initial non-linear ink profile, the linerization 
array should be empty.

When you do "multiple iterations through the process" do you clear 
the linerization array each time?