QTR-Quadtone RIP

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