Well, I am interested to see where the method outlined by LDM ends up.
We could choose 1000 K (726.85 C) as the start point. The starting emissivity for this T would be the respective value in the Lugano report Plot 1, I suppose.
I thought I had an Excel file made by someone that digitized this at some point. We should agree on the alumina total emissivity vs temperature plot to use before getting carried away and introducing extra complications into this method comparison.
Maybe someone that can use Python can use the code from the TC "Comment" report appendix and run another parallel test?
Or maybe we should use one of those temperatures that were used in the TC report for comparison to something already done (run 5 or 6, the "jump"), saving some work?
EDIT: This link is to Bob Higgins' file, which has a good alumina total Emissivity vs Temp plot we can use (on second tab).