[TheForge] Possible replacement for ITC 100

[theforge@mailman.qth.net]

Larry Z.
Very interesting figures. It will be fascinating to see how your experiments 
work out. I would volunteer, but my time is spent tinkering with new equipment 
rather than running existing tools. Still, If you run short of better 
qualified people, I can always paint some in a new forge or furnace to see what 
happens.
  One fact of interest to you might be that the reflective ratings at 
elevated temperatures, which you list for zirconia, are the same that I see quoted 
for ordinary #200 mesh.
  ITC #100 is claimed to be a "colloidal formula."  However, any colloidal 
particles in the formula would allow that claim to be made, including particles 
in a binder.
  I have deliberately mixed #100 with too much water, allowed the larger 
particles to settle out, and painted the watery mix on forge insulation. This 
seemed to result in higher IR reflection. The forge went from lemon yellow up to 
yellow white with the same burner input. My personal conclusion was that 
economical #200 mesh zirconia could be suspended in water to separate the colloidal 
particles and used the same way. Just an alternative possibility.
Michael Porter


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