QTR-Quadtone RIP

Richard, I think it was Walker who posted about using GO in 7 (or more) channel printers with Cone’s new PiezoDN system, that you are thinking of. I am currently beta-testing the system but on a 6 channel 1430, so no GO.

Scott, I can’t try to answer your question either, without more info. First, what printer and what inkset. Second, if you are using a 21-step or other step tablet for calibration, a plot of the results you are getting and referring to in your question would be very helpful. Third, what steps have you taken with the profile so far, i.e. Gray Curve, Linearize, etc. 

Keith

Keith Schreiber
jkschreiber.com




> On May 24, 2016, at 9:21 AM, richard@... [QuadtoneRIP] <QuadtoneRIP@yahoogroups.com> wrote:
> 
> What do you mean by flatten the slope? Do you mean that the LLK ramps up too quickly and produces too much tonal separation in the shadows of the print? Creating a correction curve should fix this without too much trouble. Getting ink into the 0 patch isn't possible with the QTR tools. I remember (I think it was Kieth Shreiber) posted about the 0 step being reserved for GO and it will not allow you to ink at that step, even if you define it with a specific ink curve to print something like Curve_LLK="0:5 5:40 10:50 ... 100:0"
> 
> Can you post the ink descriptor file as plain text? That will give some clue about where you are and what you're trying to do. 
> 
> Richard Boutwell 
> 
>