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  2. Pencil - Wikipedia

    en.wikipedia.org/wiki/Pencil

    Most pencil cores are made of graphite powder mixed with a clay binder. Graphite pencils (traditionally known as "lead pencils") produce grey or black marks that are easily erased, but otherwise resistant to moisture, most solvents, ultraviolet radiation and natural aging.

  3. Mechanical pencil - Wikipedia

    en.wikipedia.org/wiki/Mechanical_pencil

    A mechanical pencil or clutch pencil is a pencil with a replaceable and mechanically extendable solid pigment core called a "lead" / ˈ l ɛ d /. The lead , often made of graphite , is not bonded to the outer casing, and the user can mechanically extend it as its point is worn away from use.

  4. Copying pencil - Wikipedia

    en.wikipedia.org/wiki/Copying_pencil

    A copying pencil, also an indelible pencil or chemical pencil, [1] is a pencil whose lead contains a dye. The lead is fabricated by adding a dry water-soluble permanent dye to powdered graphite—used in standard graphite pencils—before binding the mixture with clay. [2] [3]

  5. Dry lubricant - Wikipedia

    en.wikipedia.org/wiki/Dry_lubricant

    Graphite is characterized by two main groups: natural and synthetic. Synthetic graphite is a high temperature sintered product and is characterized by its high purity of carbon (99.5−99.9%). Primary grade synthetic graphite can approach the good lubricity of quality natural graphite. Natural graphite is derived from mining.

  6. Graphite - Wikipedia

    en.wikipedia.org/wiki/Graphite

    From the 16th century, all pencils were made with leads of English natural graphite, but modern pencil lead is most commonly a mix of powdered graphite and clay; it was invented by Nicolas-Jacques Conté in 1795. [60] [61] It is chemically unrelated to the metal lead, whose ores had a similar appearance, hence the continuation of the name.

  7. Allotropes of carbon - Wikipedia

    en.wikipedia.org/wiki/Allotropes_of_carbon

    Graphite, named by Abraham Gottlob Werner in 1789, from the Greek γράφειν (graphein, "to draw/write", for its use in pencils) is one of the most common allotropes of carbon. Unlike diamond, graphite is an electrical conductor. Thus, it can be used in, for instance, electrical arc lamp electrodes.

  8. Setting Powder vs. Finishing Powder: Here’s How They ... - AOL

    www.aol.com/setting-powder-vs-finishing-powder...

    Confused about the difference between setting powder and finishing powder? That’s completely understandable. At a glance, the two products look virtually the same (they either come in a loose ...

  9. Writing in space - Wikipedia

    en.wikipedia.org/wiki/Writing_in_space

    The graphite in pencils is mixed with clay during fabrication of the "lead" to help hold its shape, and would only burn at greater than 1,000 °C (1,832 °F). [10] The quantity of graphite particles actually produced during occasional writing would be too small to constitute an electrical hazard.

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