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  2. Bluing (steel) - Wikipedia

    en.wikipedia.org/wiki/Bluing_(steel)

    Rust bluing was developed between hot and cold bluing processes, and was originally used by gunsmiths in the 19th century to blue firearms prior to the development of hot bluing processes. The process was to coat the gun parts in an acid solution, let the parts rust uniformly, then immerse the parts in boiling water to convert the red oxide Fe 2 O

  3. Talk:Bluing (steel) - Wikipedia

    en.wikipedia.org/wiki/Talk:Bluing_(steel)

    Hot bluing is extremely sensitive to certain impurities, and to properly cleaning the metal of all oil residue prior to attempting to blue it. If some specific impurities are present, or if all oil is not carefully removed, then the hot bluing always fails. If an adequate amount of water is not present, then the bluing fails, too.

  4. Black oxide - Wikipedia

    en.wikipedia.org/wiki/Black_oxide

    The NaOH (caustic soda) and elevated temperature cause Fe 3 O 4 (black oxide) to form on the surface of the metal instead of Fe 2 O 3 (red oxide; rust). While it is physically denser than red oxide, the fresh black oxide is porous, so oil is then applied as post treatment to the heated part, which seals it by "sinking" into it.

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  6. Bluing - Wikipedia

    en.wikipedia.org/wiki/Bluing

    Bluing (steel) is a passivation process in which steel is partially protected against rust Bluing may also 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" of machine parts to check for tolerances, see engineer's blue

  7. Man, 79, Goes Viral After Unexpected Meeting with Stranger ...

    www.aol.com/man-79-goes-viral-unexpected...

    Robert Kapas was sitting in a local mall in Atlanta wearing his homemade fish hat, when a man named Leo stopped to ask about it. After hearing the story behind the hat, Leo asked Kapas if he could ...

  8. Caustic ingestion - Wikipedia

    en.wikipedia.org/wiki/Caustic_ingestion

    Caustic ingestion occurs when someone accidentally or deliberately ingests a caustic or corrosive substance. Depending on the nature of the substance, the duration of exposure and other factors it can lead to varying degrees of damage to the oral mucosa , the esophagus , and the lining of the stomach .

  9. Narcissists maintain control through ‘bright siding.’ Here’s ...

    www.aol.com/narcissists-maintain-control-bright...

    "Try to see the good in people." "Come on − he can't be that bad." "You should be grateful to even be in a relationship." If you've heard these phrases before, chances are you've been bright sided.