Bluing

Bluing may refer to:

  • Bluing (fabric), a blue dye used to improve the appearance of fabrics
  • Bluing (hair), a blue dye used to improve the appearance of hair
  • Bluing (steel), a passivation process in which steel is partially protected against rust
  • "bluing" of machine parts to check for tolerances, see engineer's blue

See also

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