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  2. Color temperature - Wikipedia

    en.wikipedia.org/wiki/Color_temperature

    More-subtle filters are needed to correct for the difference between, say 3200 K and 3400 K tungsten lamps or to correct for the slightly blue cast of some flash tubes, which may be 6000 K. [21] If there is more than one light source with varied color temperatures, one way to balance the color is to use daylight film and place color-correcting ...

  3. Tungsten - Wikipedia

    en.wikipedia.org/wiki/Tungsten

    Tungsten electrode used in a gas tungsten arc welding torch Tungsten filament is used in incandescent lightbulbs, where it is heated until it glows Because of its conductive properties and relative chemical inertness, tungsten is also used in electrodes , and in the emitter tips in electron-beam instruments that use field emission guns , such ...

  4. Tungsten pentoxide - Wikipedia

    en.wikipedia.org/wiki/Tungsten_pentoxide

    Tungsten pentoxide (W 2 O 5) was reported in early literature but proved to have the stoichiometry W 18 O 49. [1] Sometimes called mineral blue, it is a blue solid formed by the reaction of tungsten trioxide, WO 3 , and tungsten metal at 700 °C.

  5. Chemical coloring of metals - Wikipedia

    en.wikipedia.org/wiki/Chemical_coloring_of_metals

    The color depends on voltage. Many other electrolytes can be used—even Coca-Cola. Straw yellow / 10V – violet / 29 V – blue / 30 V – blue green 45 V – light green / 55 V – purple-red / 75 V – grey / 110 V. It is mandatory that this process must be performed wearing rubber gloves (potentially dangerous voltage!). [37]

  6. Tungsten film - Wikipedia

    en.wikipedia.org/wiki/Tungsten_film

    When shot outdoors, tungsten film produces a strong blue cast, an effect which is often used purposely to create different color contrasts. In the motion picture industry the use of underexposed tungsten-balanced film in an outdoor setting is a common way of producing a " day for night " effect, whereby film shot during the daytime looks as if ...

  7. Electrical wiring in North America - Wikipedia

    en.wikipedia.org/wiki/Electrical_wiring_in_North...

    In both those instances the white wire should be identified as being hot, usually with black tape inside junction boxes. The neutral wire is identified by gray or white insulated wire, perhaps using stripes or markings. With lamp cord wire the ribbed wire is the neutral, and the smooth wire is the hot. NEC 2008 400.22(f) allows surface marking ...

  8. The outcome of the election that year dragged on for more than a month – 36 days until the US Supreme Court halted a partial Florida recount and essentially handed the election to George W. Bush.

  9. Refractory metals - Wikipedia

    en.wikipedia.org/wiki/Refractory_metals

    For the production of the tungsten heavy alloy, binder mixtures of nickel and iron or nickel and copper are widely used. The tungsten content of the alloy is normally above 90%. The diffusion of the binder elements into the tungsten grains is low even at the sintering temperatures and therefore the interior of the grains are pure tungsten. [18]

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