2016-04-04 by richard@...
A quick note about what the "density" setting does in the curve creator mode. That is the setting for the cross over point for partitioning the toner between two or more different inks. If you are only using one ink It might move the peak of that channel one way or the other, but unless it has a setting of 100 it will never be printed at the far right of the scale (the 100% density). A better option might be setting the "density" to 100, and use the toner highlight and toner shadow settings to affect how much toner is being applied in the lighter/darker end of the scale. You could also use the toner gamma or toner curve settings in addition to the toner highlight/toner shadow settings to have even more control over how it is being applied (leaving the toner highlight and shadow setting to "0" will create a straight line from 0%-100% of whatever the ink limit is). Using the ink curve (rather than toner curve) would bypass the toner settings and allow you to distribute the toner ink the way paul is doing in his second example.
I have been thinking about how to work on a way to use a kind of interpolated inverse correction curve for the toner curves that take into account the color and density of the gray inks and the paper base to create an even a and b distribution. The trouble is the density of the toner ink would affect the linearization and then the color would shift again once linearized.... constantly moving targets.
—Richard Boutwell