I went further in my PiezoDN experience and followed the manual’s instruction to limit the 1430-PiezoDN-Master.quad and made it to the 1430-PiezoDN-Master-lin.quad. I actually used the very same limit number as the manual’s exemple, that correspond to my need.
The “Photoshop curve to apply to the final print” makes sense to me, limiting the highlights.
But looking at the files with QTR-CurveView, I just can’t understand how the lin.quad will make a thinner negative. It seems to me that the changes at the end and middle of the curves will make darker shadows and middtones when the lighter tones of the final print will remain unchanged.
I know curves are reversed because PiezoDN uses positives, and yes that confuses me.
Please, what am I missing?