Hahnemuhle Photo Rag (HPR). I use this curve on my 3880 (OEM inks) for several smooth matte rag papers, such as CRP and Innova Smooth Cotton. On my printer the stock HPR curve is close to dead linear, almost to the point of not needing relinearisation with my i1. CRP & ISC exhibit virtually exactly the same linearity as HPR using the HPR curve and I could also use it for them unrelinearised if I had to. I use the HPR curve as a generic starting point when I need to create a curve for a new matte paper. I haven't tried CRP using the EEM curve, and while I imagine it wouldn't be too bad, HPR is virtually an exact match on my printer.