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Normal Topic Color Case Hardening (Read 143 times)
Purdey
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Color Case Hardening
Sep 4th, 2026 at 12:02pm
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I'm about ready to play around with some color case hardening.  I have made my own bone charcoal and hardwood charcoal which I will mix 50/50 for packing around the parts.  What is the ideal particle size for the charcoal?  How fine should I crush it?
  
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craigd
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Re: Color Case Hardening
Reply #1 - Sep 4th, 2026 at 4:46pm
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The Brownells sieve size is 10/28, that might come out to a range of 2 to .6 mm.
  
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