QTR-Quadtone RIP

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

> **
>
>
> Paul
>
> At the moment the current profile has ink limit at 58, C at 100 and LC at
> 48, ...
>
Do you mean the default ink limit is at 58, the C density is at 100, and
the LC density at 48?  I looked at that curve, and I think you have too
much LC in there.

You might want to lower the LC in limit.  Try about 30.

Also, see if lowering the C ink limit about 10 (to 48) and using the Black
Boost to get to the final K ink limit works.  When you lower the C limit,
the relative density of the LC will change.

Paul
www.PaulRoark.com




> 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
> >
> >
> > [Non-text portions of this message have been removed]
> >
>
>  
>


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