Bluing

Black or dark blue finishing is the application of a noble oxide layer to steels and ferrous materials. Depending on the customer's desires and the nature of the materials, two different processes can be used:

  1. The parts are immersed in an acid bath at a high temperature to obtain a glossy black surface.
  2. The parts are often coated with a special tincture, then brushed again to obtain a matt blueish black satin surface. (Often used on older weapons or weapons with several barrels)

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