Once more again about the accuracy of printer profiles.
I have evaluated the accuracy of profiles using (printing and measuring) the "adapted" Ugra/Fogra Media Wedge CMYK v3.0 testchart.
Printer: Canon PIXMA Pro9500
Paper: Epson Archival Matte Paper
1. The ColorMunki printer profile, standard profiling (50+50 patches)
avr dE00=1.6, max dE00=3.3
2. The ColorMunki printer profile, profiling with additional patches (450 patches in total)
avr dE00=1.52, max dE00=3.11
3. The printer profile created with i1Pro UV-cut and ProfileMaker 5.0.8 from 283 unique patches
avr dE00=1.81, max dE00=3.87
4. The printer profile created with i1Pro UV-cut and ProfileMaker 5.0.8, TC9.18 (918 unique patches)
avr dE00=1.08, max dE00=2.85
5. The printer profile created with i1Pro UV-cut and ProfileMaker 5.0.8 from 2244 unique patches
avr dE00=0.98, max dE00=2.81
Interpreting this with my very limited knowledge of delta-E values, doesn't it mean that the difference between the profiles produced with 100 and 2,244 patches is imperceptible to the human eye, thus only useful for academic purposes (and I presume some highly specialized technical work)?