QTR-Quadtone RIP

Hi Paul, thanks for your reply.
I lowered the ink limits and set the gamma to 2.2 which drops the black curve off more sharply.
The 21 step wedge is now much better at the dark end.
When you look at the ink density pattern, do you check by eye to see where the density flattens out or actually measure it. The second saturation scan is done at 85%, where is this taken into account in the curve creation?

I have done this before but I accidently overwrote the values with blank data. I can't remember what I used for a reference grey card in the linearisation process. I have a couple of IT8 targets. Is the grey scale at the bottom of that card suitable?

Cheers
Greg Nixon



--- In QuadtoneRIP@yahoogroups.com, Paul Roark <roark.paul@...> wrote:
>
> It sounds like  you've set the ink limit too high.
> 
> First, be sure that the ink limit is (at most) set to what I call the left
> edge of the plateau.  As the K density rises, it wii hit a plateau where it
> will see-saw for a while.  You want to stay off that plateau.
> 
> Second, you might try setting the ink limit to the last K step where you
> actually can visually see a density increase.  Then have the black boost
> carry the K to a higher point if your scanner or spectro measures a deeper
> black beyond that point.
> 
> I would concentrate on getting these initial settings correct and not alter
> the defaults in the middle tabs.
> 
> Paul
> www.PaulRoark.com
> 
> On Thu, May 2, 2013 at 6:44 AM, Greg <gregnixon@...> wrote:
>