A few observations on the Baryta paper type.
Difference between Pro Platinum and Baryta is rather significant, as reported earlier. On a 512 patch test, I get this:
de2k
Verify results:
Total errors (CIEDE2000): peak = 9.217798, avg = 3.392068
Worst 10% errors (CIEDE2000): peak = 9.217798, avg = 6.850318
Best 90% errors (CIEDE2000): peak = 6.040733, avg = 3.009485
avg err X 0.021547, Y 0.024246, Z 0.021860
avg err L* 3.403466, a* 1.757760, b* 2.043125
de76
Verify results:
Total errors: peak = 12.742354, avg = 4.896999
Worst 10% errors: peak = 12.742354, avg = 9.243197
Best 90% errors: peak = 7.915209, avg = 4.416183
avg err X 0.021547, Y 0.024246, Z 0.021860
avg err L* 3.403466, a* 1.757760, b* 2.043125
Matching the around 4 dE average reported. I can add that Baryta generally prints darker throughout the gamut. So yes, reprofiling needed.
As a base for custom media type, I can confirm that quality Highest now maps to quality 2 (as seen by Accounting Manager). Previously with other PBK based media, Highest mapped to 3, and 2 only achieved by choosing custom quality and dragging slider to the end. Seems like a bugfix.
Running a Baryta based custom media type on low head height, I got what looks like some kind of rubbing across the print (mild head strike likely) over some millimeters around 2 cm before paper end (A4). Platinum Pro defaults to low head height. I might need to increase to Standard head height, and/or level the paper so it doesn't dip down close to being done printing (I tried but seemed still an issue).
Sepia toned prints still have a lot of gloss diff / bronzing. Can look very yellow at odd angles. And yes, to me odd angles matter, when handling/passing prints around on a table, when people approach an image from the side (framed on wall) etc. Even if viewer is aware of optimal viewing angle, you cannot control an unattractive odd angle view while viewer/paper is "in transit".
Ink usage seem to be higher on Baryta.