Color Case Hardening Effect using Cold Blue

While experimenting with aging steel and seeing what can be done with various chemicals I accidentally learned that a Cold Blue solution can be used to simulate patterns produced by Color Case Hardening.
See for yourselves.

• #entertainment
• #cold_blue
• #color_case_hardening
• #effect
• #fake
• #simulate
• #look_like
• #make
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• #simple
• #diy
• #steel
• #4140