John: For Piezography 2, we have made separate curve libraries for each of the five main Piezography ink tones: Neutral, Carbon, Selenium, Special Edition and Warm-Neutral. Each library includes 10 pre-made curves for Jon Cone Studio 2 + 5 papers, as well as a few of the most popular Canson, Moab and Epson papers. We are very close to releasing this product, so keep an eye on our website and newsletters for the announcement!
Andy: The five different Piezography ink tones share such similar density between the different shade inks, that the same curve can be used specific only to the printer model/family and paper to get very good results. The ink shades are VERY similar (e.g: shade 4 of Neutral, Carbon, Selenium, Warm-Neutral and Special Edition are all similar density; shade 5 ink of each tone are similar, etc...)- but not exactly the same, so using a curve that is specific to the printer, paper and ink will provide the absolute highest quality output. We made curve libraries specific to the five different Piezography ink tones to increase the output quality even more for the new Piezography 2 system. As with K7, we can make custom P2 curves for anyone who wants to print on papers not included in the pre-made curve libraries.
I hope this helps clarify, please let me know if you have further questions or if there's anything else I can help you with.
Best regards and happy printing~ Dana