QTR-Quadtone RIP

Agreed, the smooth ramp gradient nonlinearities you are describing are 
associated with poor ink density partitioning.  It is not QTR's fault 
(at least at this stage). Try updating your relative ink densities 
following more Tom Cooper than Paul Roark work flows.  The resulting 
plot of the measured nonlinear step L values verse step number or step 
% should look like the Paul Roark figure (a smooth curve below the 
line connecting 0 and 100% L -- indicating darker steps than the final 
linearized steps).  Note:  These are the values you plug back into 
your non-linear QTR profile to create a final linear profile.

Good luck. 

--- In QuadtoneRIP@yahoogroups.com, "Mike Dawson" <dawsonm@...> wrote:

> No, I am not getting banding in the 
> initial 21-step wedges for the individual inks during calibration 
> mode.  I am getting banding on the 21step.tif file that is printed 
> out after you take QTRgui out of calibration mode. These gradient 
bands are 
> obvious in the smooth gradient that runs across the top of the step 
> wedge.  The bands extend down into the 5% blocks and it seems would 
> have an impact on the measuring of the 5% blocks for linearization.