QTR-Quadtone RIP

Paul

At the moment the current profile has ink limit at 58, C at 100 and LC at 48, which I think is what you suggest.  This was giving me the same problem mentioned earlier.  Looking at the installed profile in QTR-Curveview, what I'm assuming is the crossover point between the two inks, where PK rises above LC which is diminishing to 0, is about the point where the problem occurs, might this have anything to do with it?  I was going to post the curveview image, to see if you thought it looked okay, but can't work out how to do anything with a screenshot on a Mac!!

I've reloaded QTR and all the test images to see if this will help rectify the position, I'm going to calibrate at 50% and graph a curve as per Dave's post to see where that gets me.

Ross

--- In QuadtoneRIP@yahoogroups.com, Paul Roark  wrote:

> 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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