Hi. I have recently started linearising my first piezo pro curves for my different media on a 7900. I have followed Walker’s advice in a different post of using Canson Baryta as the master for glossy media, and I believe it was Hahnemuhle Photo Rag as the master for matte media.
Initial 51 step target for glossy media looks great, but on my matte smooth fine art paper (Breathing Color Signa Smooth), the last black patch ink looks too heavy (it is darker if viewed from some angles, but at other angles there is a change in reflectance characteristics / gloss differential, and it appears lighter than the previous patch). Also, on many of the other darker-mid grey patches especially there is visible mottling or dot noise, not a consistent smooth tone. (In comparison, my color profiling patches for the same paper on an older Canon printer are totally smooth).
So my suspicion is that the Hahnemuhle photo rag quad curves are giving it more ink than it can handle, and it needs to be dialled down a bit. What is the best way to experiment with that (unless there is a different issue going on)?
I’ve noticed the QTR driver has a checkbox for Advanced Adjustments, and an ink limit slider (Mac version). Would this be the proper tool to use, while retaining the specific characteristics of the piezo quad curves? Or is it better to somehow directly edit the figures in the quad curve (I suppose by running a multiplication factor formula in excel?)
BTW, I am using all the recommended settings (2880, unidirectional). I have tested and adjusted feed values for each of my papers, paper thickness settings, and head alignment (which did seem to help a little). Nozzle checks were clear before printing. Just in case there was an issue somehow with the matte curve itself, I tested that on glossy paper and there was no noise/dotting issue on that media.
Sorry for the long post, just trying to cover all the bases!
Thanks for your help.