Bluing

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Bluing may refer to:

  • Bluing (fabric), household product used to improve the appearance of fabrics
  • Bluing (steel), passivation process in which steel is partially protected against rust
  • "bluing" of machine parts to check for tolerances, see engineer's blue
  • Mrs. Stewart's Bluing, brand of fabric bluing agent that whitens fabrics by adding a blue dye