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  2. Bluing (steel) - Wikipedia

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

    Friction, as from holster wear, quickly removes cold bluing, and also removes hot bluing, rust, or fume bluing over long periods of use. It is usually inadvisable to use cold bluing as a touch-up where friction is present. If cold bluing is the only practical option, the area should be kept oiled to extend the life of the coating as much as ...

  3. Engineer's blue - Wikipedia

    en.wikipedia.org/wiki/Engineer's_blue

    Engineer's blue is prepared by mixing Prussian blue with a non-drying oily material (for example, grease).The coloured oil is rubbed onto a reference surface, and the workpiece is then rubbed against the coloured reference; the transfer (by contact) of the pigment indicates the position of high spots on the workpiece or conversely highlight low points. [1]

  4. 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

  5. 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.

  6. Encaustic painting - Wikipedia

    en.wikipedia.org/wiki/Encaustic_painting

    The wax encaustic painting technique was described by the Roman scholar Pliny the Elder in his Natural History from the 1st Century AD. [5] The oldest surviving encaustic panel paintings are the Romano-Egyptian Fayum mummy portraits from Egypt , around 100–300 AD, [ 6 ] but it was a very common technique in ancient Greek and Roman painting.

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  8. Paint thinner - Wikipedia

    en.wikipedia.org/wiki/Paint_thinner

    Some paint thinners spontaneously ignite in relatively low temperature. The most common paint thinner, white spirit, has a very low flash point, at about 40 °C (104 °F), [5] the same as some popular brands of charcoal starter. [6] All such solvents with low flash points are hazardous and must be labelled as flammable. [7] [8]

  9. Paint stripper - Wikipedia

    en.wikipedia.org/wiki/Paint_stripper

    Paint remover is applied to an aircraft's landing gear during an inspection looking for cracks in the aluminum. Paint stripper or paint remover is a chemical product designed to remove paint, finishes, and coatings, while also cleaning the underlying surface. Chemical paint removers are advantageous because they act on any kind of geometry and ...

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