There is a program
http://www.hotwork.org/RLTM/RLTM.html
That is a neat program you have to pay for it, but it looks interesting, for calculating cold face temperatures of various materials layered or not.
There is a free sample running download.
Has anyone used this program? Or seen it?
I am not affliated with this in any way, unless I can get one for free.....
ed