QTR-Quadtone RIP

I think my experiences are consistent with the views of this thread.


>> I had my default ink limit set fairly high initially, 
>> where the curve was getting very flat. 
>>... The 90, 95 and 100% tones were bunched up pretty close. 

Some set their dmax not to the point of absolute darkest, but to that point
where the curve becomes so flat the noise and variables might cause future
posterization.   

Usually the higher the load of an ink (more pigment particles relative to
base), the sooner it will reach the point where the curve's slope is too low
to be useful or reliable.

The MK is the highest load ink.  So, I use it for the default ink load.
Usually you can then simply ignore the black boost and other ink limits.  I
set this with a single 21-step curve printed with a straight line curve
profile.  I make the curve by entering the coordinates (0, 0) and (100, 100)
in QTR's "Point List."  (Tools>Curve Creation>Curve>Point List tab)  In
short, on 21-step print takes care of dmax and all ink limit (and black
boost) issues in making the profile.

>... It is better to start with a more 
>conservative max density for building curves, and after you have 
>everything working right, then you can mess with BOOST K, OVERLAP, etc.

Among other things, I prefer to have a reasonable good curve going into the
linearization.   With respect to the adjustments in the tabs between the Ink
Setup and Linearization tabs, I leave adjustments in their default
positions.  As one expert once commented about Gimp print in another
context, it has lots of controls, but most of them are not worth bothering
with.

Paul
www.PaulRoark.com