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  2. Pyrography - Wikipedia

    en.wikipedia.org/wiki/Pyrography

    This is important to sand with the grain. Also the grain can cause deviation from its intended path with use of woodturning pen unless the artist applies more pressure and burns slower on the grain. Figure: This is the natural design, or pattern, that can be seen on the cut surface of the wood. The figure present on the wood should always be ...

  3. Igneous textures - Wikipedia

    en.wikipedia.org/wiki/Igneous_textures

    Pyroclastic (pyro = igneous, clastic = fragment) textures occur when explosive eruptions blast the lava into the air resulting in fragmental, typically glassy material which falls as volcanic ash, lapilli, and volcanic bombs.

  4. Flash powder - Wikipedia

    en.wikipedia.org/wiki/Flash_powder

    The stoichiometric ratio is 34.2% aluminum and 65.8% perchlorate by mass. A ratio of seven parts potassium perchlorate to three parts dark pyro aluminium is the composition used by most pyrotechnicians. For best results, the aluminium powder should be "Dark Pyro" grade, with a flake particle shape, and a particle size of fewer than 10 micrometres.

  5. John Leonard Orr - Wikipedia

    en.wikipedia.org/wiki/John_Leonard_Orr

    John Leonard Orr (born April 26, 1949) [1] is an American convicted serial arsonist, mass murderer and former firefighter.A fire captain and arson investigator in Glendale, California, Orr was convicted of serial arson and four counts of murder; [2] he is believed to have set nearly 2,000 fires in a thirty-year arson spree, most of them between 1984 and 1991, making him the most prolific ...

  6. Pyroprocessing - Wikipedia

    en.wikipedia.org/wiki/Pyroprocessing

    Pyroprocessing (from Greek Πυρος = fire) is a process in which materials are subjected to high temperatures (typically over 800 °C) in order to bring about a chemical or physical change.

  7. Falling-sand game - Wikipedia

    en.wikipedia.org/wiki/Falling-sand_game

    A falling-sand game is a genre of video game and a sub-genre of sandbox games which typically utilize a two-dimensional particle or cellular automaton based game engine to simulate various materials interacting in a sandbox environment.

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  9. Pyrometallurgy - Wikipedia

    en.wikipedia.org/wiki/Pyrometallurgy

    Pyrometallurgy is a branch of extractive metallurgy.It consists of the thermal treatment of minerals and metallurgical ores and concentrates to bring about physical and chemical transformations in the materials to enable recovery of valuable metals. [1]