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  2. Dye - Wikipedia

    en.wikipedia.org/wiki/Dye

    Dye. Drying colored cloth. Chemical structure of indigo dye, the blue coloration of blue jeans. Although once extracted from plants, indigo dye is now almost exclusively synthesized industrially. [1] A dye is a colored substance that chemically bonds to the substrate to which it is being applied. This distinguishes dyes from pigments which do ...

  3. Royal Purple (lubricant manufacturer) - Wikipedia

    en.wikipedia.org/wiki/Royal_Purple_(lubricant...

    Royal Purple is an American manufacturer which produces lubricants for automotive, industrial, marine, and racing use. It is known primarily for its line of synthetic Royal Purple Motor Oil products used in gasoline and diesel engines.

  4. Colloidal gold - Wikipedia

    en.wikipedia.org/wiki/Colloidal_gold

    Colloidal gold is a sol or colloidal suspension of nanoparticles of gold in a fluid, usually water. [1] The colloid is coloured usually either wine red (for spherical particles less than 100 nm) or blue-purple (for larger spherical particles or nanorods ). [2]

  5. Bluing (steel) - Wikipedia

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

    Bluing (steel) Bluing, sometimes spelled as blueing, is a passivation process in which steel is partially protected against rust using a black oxide coating. It is named after the blue-black appearance of the resulting protective finish. Bluing involves an electrochemical conversion coating resulting from an oxidizing chemical reaction with ...

  6. Tyrian purple - Wikipedia

    en.wikipedia.org/wiki/Tyrian_purple

    Tyrian purple is a pigment made from the mucus of several species of Murex snail. Production of Tyrian purple for use as a fabric dye began as early as 1200 BC by the Phoenicians, and was continued by the Greeks and Romans until 1453 AD, with the fall of Constantinople.

  7. Potassium permanganate - Wikipedia

    en.wikipedia.org/wiki/Potassium_permanganate

    It is a purplish-black crystalline salt, that dissolves in water as K + and MnO−. 4, an intensely pink to purple solution. Potassium permanganate is widely used in the chemical industry and laboratories as a strong oxidizing agent, and also as a medication for dermatitis, for cleaning wounds, and general disinfection.

  8. Polyolefin - Wikipedia

    en.wikipedia.org/wiki/Polyolefin

    Polyolefin. A polyolefin is a type of polymer with the general formula (CH 2 CHR) n where R is an alkyl group. They are usually derived from a small set of simple olefins ( alkenes ). Dominant in a commercial sense are polyethylene and polypropylene. More specialized polyolefins include polyisobutylene and polymethylpentene.

  9. Smart manufacturing - Wikipedia

    en.wikipedia.org/wiki/Smart_manufacturing

    Smart manufacturing is a broad category of manufacturing that employs computer-integrated manufacturing, high levels of adaptability and rapid design changes, digital information technology, and more flexible technical workforce training.

  10. Tempering (metallurgy) - Wikipedia

    en.wikipedia.org/wiki/Tempering_(metallurgy)

    Purple – 282 °C (540 °F) – surgical tools, punches, stone carving tools; Dark blue – 310 °C (590 °F) – screwdrivers, wrenches; Light blue – 337 °C (639 °F) – springs, wood-cutting saws; Grey-blue – 371 °C (700 °F) and higher – structural steel

  11. Passivation (chemistry) - Wikipedia

    en.wikipedia.org/wiki/Passivation_(chemistry)

    Passivation involves creation of an outer layer of shield material that is applied as a microcoating, created by chemical reaction with the base material, or allowed to build by spontaneous oxidation in the air. As a technique, passivation is the use of a light coat of a protective material, such as metal oxide, to create a shield against ...