In this specific case, I was referring to color prints so by your thinking, I hsould get an IT8 on Fuji Crystal or whatever
is/was used but rarely does one know, esp for older prints and honestly, in that case, probably just use the scanner
calibration and be done w/ it. It could easily turn into yet another rat hole.
But, for the slides I want to scan, I do have the Kodak Kodachrome IT8/Q60 target and I made an .icc for that (note: i1Publisher does NOT natively
support Kodachrome target, you have to swap in the header for the Ektachrome target so it will accept the .Q60 file)
(Although Argyll will do it all just fine).