I really dove into making QTR digital negatives over the past two years and built a whole new system from the ground up. For now, I this new system is about as good as it is going to get for people using custom ink sets with 4 or more shades of gray ink. I have been tested it with 4-7 shades over the past few months and even used it to print the negatives for a recent show. I'll be showing these at APIS in a few weeks if any one here is going.
In short, the new system has its own quad curve partitioning and linearization system that does not rely on any of the standard QTR curve creation or linearization tools. You enter measurements from the ink calibration images into the profiler and it does all the partitioning for you and spits out a new .quad file. Linearization is done with either a 21, 51, or 128 step target and the built in formulas.
Here is a bit of a punchy blog post I wrote after an all-nighter if you want more detail about how it works.
Dead Link Removed
In short, the new system has its own quad curve partitioning and linearization system that does not rely on any of the standard QTR curve creation or linearization tools. You enter measurements from the ink calibration images into the profiler and it does all the partitioning for you and spits out a new .quad file. Linearization is done with either a 21, 51, or 128 step target and the built in formulas.
Here is a bit of a punchy blog post I wrote after an all-nighter if you want more detail about how it works.
Dead Link Removed
