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  2. Gunshot residue - Wikipedia

    en.wikipedia.org/wiki/Gunshot_residue

    The presence of nitrite ions is what triggers the colour change, and therefore we do not consider this test to be indicative of GSR. [4] The sodium rhodizonate test can detect the presence of lead and barium; it results in a red or purple color when lead is present in the tested area, [7] and a reddish-brown colour when exposed to barium. [2]

  3. ChromaFlair - Wikipedia

    en.wikipedia.org/wiki/ChromaFlair

    Video of the color change effect. ChromaFlair is a pigment used in paint systems, primarily for automobiles. When the paint is applied, it changes color depending on the light source and viewing angle. It was created at Optical Coating Laboratory, Inc. (OCLI) [later JDS Uniphase and Viavi Solutions] in 1979 and is used by DuPont and PPG.

  4. Purple-K - Wikipedia

    en.wikipedia.org/wiki/Purple-K

    Purple-K, also known as PKP, is a dry-chemical fire suppression agent used in some dry chemical fire extinguishers. It is the second most effective dry chemical in fighting class B (flammable liquid) fires after Monnex (potassium allophanate), and can be used against some energized electrical equipment fires (USA class C fires). [2]

  5. How To Remove Annoying Hair Dye Stains From Your ... - AOL

    www.aol.com/remove-annoying-hair-dye-stains...

    When dyeing your hair, it’s much easier to take a few preventative steps than to remove the dye off your skin once it’s stained. Here's what a few pros suggest.

  6. How Hair Colorists Want You To Use Purple Shampoo

    www.aol.com/hair-colorists-want-purple-shampoo...

    For premium support please call: 800-290-4726 more ways to reach us

  7. Bluing (steel) - Wikipedia

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

    It is named after the blue-black appearance of the resulting protective finish. Bluing involves an electrochemical conversion coatingresulting from an oxidizing chemical reaction with iron on the surface selectively forming magnetite(Fe. 3O. 4), the black oxide of iron. In comparison, rust, the red oxide of iron(Fe. 2O.

  8. Optical brightener - Wikipedia

    en.wikipedia.org/wiki/Optical_brightener

    These additives are often used to enhance the appearance of color of fabric and paper, causing a "whitening" effect; they make intrinsically yellow/orange materials look less so, by compensating the deficit in blue and purple light reflected by the material, with the blue and purple optical emission of the fluorophore.

  9. Automotive paint - Wikipedia

    en.wikipedia.org/wiki/Automotive_paint

    Automotive paint is paint used on automobiles for both protective and decorative purposes. [1] [2] Water-based acrylic polyurethane enamel paint is currently the most widely used paint for reasons including reducing paint's environmental impact . Modern automobile paint is applied in several layers, with a total thickness of around 100 μm (0.1mm).

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