Not for me to say how any of this arose, and I don't intend to poke my nose in by asking. Either way it makes no difference, if the sample was one of the fragments laying on the benchtop and came via Rossi's hand or was picked up by Levi and assumed to be the same material the reactor body was made from , the analysis itself is good and rather spoils any assertions of deliberate wrongdoing on the part of the Lugano team or any of its members . This 'large' mystery becomes an almost non-existent one. Anyway, I am unsure whether Durapot 810 band emissivity would be wildly different from that of pure Alumina. I am far from being a thermography expert, in fact very far away. Maybe THH can enlighten me? ***
Well I don't have a definitive answer but it would be easy to gain this by looking at a suitable casting with an Optris camera, and plotting actual temperature vs Optris temperature. or, the comparison could be got by looking at Durapot on top of alumina with a casting that covered only 50% of the alumina. The comparison in apparent temperature from optris could then be interpreted as band emissivity difference. The reason I expect a high B.E. is that insulators tend to have high emissivity...
Of course the total emissivity of Durapot is similarly uncertain (as far as I know?). I'd not expect it to be very different from alumina but certainly not rule this out.