I saw the photo of the block and of course it seems to be similar as well. I am not convinced that the casting that was treated for 12 hours and quickly removed had time to cool that much. I may be wrong, but the first reference I located showed roughly the same color as well. This also matched what was observed by the testers.
I see evidence building up that what the testers saw might have been reasonable. Also, I recall that the sun is supposed to appear near white and it is far hotter than 1400 C. We need to locate an expert in this field to settle the question. Dave -----Original Message----- From: Jed Rothwell <jedrothw...@gmail.com> To: vortex-l <vortex-l@eskimo.com> Sent: Sun, Oct 19, 2014 2:07 am Subject: Re: [Vo]:Re: Color Temperature David Roberson <dlrober...@aol.com> wrote: I found another entry relating to heat treating of metals. There is a picture of a heat treated casting that states that it was just removed from the oven after heating at 1200 C for 12 hours. I presume the castings were removed a few minutes before the photo was taken and they have cooled down to around 900 deg C. Look at the first photo in this article, "Heat treating furnace at 1,800 °F (980 °C)." The red color is similar to the e-cat color, and to the 900 deg C mark on the incandescence color bar: http://en.wikipedia.org/wiki/Incandescence#mediaviewer/File:Incandescence_Color.jpg - Jed
