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  2. UV marker - Wikipedia

    en.wikipedia.org/wiki/UV_Marker

    An ultraviolet (UV) marker is a pen whose marks are fluorescent but transparent; the marks can be seen only under an ultraviolet light. They are commonly used in security situations to identify belongings or to prevent the reproduction of unauthorized banknotes. UV pens can now be bought at some stationery shops to securely mark items of high ...

  3. Permanent marker - Wikipedia

    en.wikipedia.org/wiki/Permanent_marker

    Permanent markers are used for writing on metals, plastics, ceramics, wood, stone, cardboard etc. However, the mark made by them is semi-permanent on some surfaces.

  4. Eraser - Wikipedia

    en.wikipedia.org/wiki/Eraser

    Typically the eraser is a pen-shaped device with a replaceable insert with glass fibers, which wear down in use. The fibers are very hard; in addition to removing pencil and pen markings, such erasers are used for cleaning traces on electronic circuit boards to facilitate soldering, removing rust, and many other applications.

  5. Optical mark recognition - Wikipedia

    en.wikipedia.org/wiki/Optical_mark_recognition

    OMR systems approach one hundred percent accuracy and only take 5 milliseconds on average to recognize marks. [18] Users can use squares, circles, ellipses and hexagons for the mark zone. The software can then be set to recognize filled in bubbles, crosses or check marks. OMR can also be used for personal use.

  6. Fact check: Pencils are normally used to vote as ink can ...

    www.aol.com/fact-check-pencils-normally-used...

    Pencils are commonly used at polling stations instead of pens. This is because ink might run on to different sections of the ballot and obscure the voter’s choice. The Facts

  7. Counterfeit banknote detection pen - Wikipedia

    en.wikipedia.org/wiki/Counterfeit_banknote...

    A counterfeit banknote detection pen, used to detect fake banknotes. A counterfeit banknote detection pen is a pen used to apply an iodine-based ink to banknotes in an attempt to determine their authenticity. The ink reacts with starch in wood-based paper to create a black or blue mark but the paper in a real bill contains no starch, so the pen ...

  8. What type of pen does Donald Trump use? Here's how he signs ...

    www.aol.com/type-pen-does-donald-trump-183826477...

    What happens after an executive order is signed? After a president signs an executive order, the White House sends the document to the Office of the Federal Register, the executive branch's ...

  9. Your Ring Could Be Worth Thousands: How To Spot Valuable ...

    www.aol.com/ring-could-worth-thousands-spot...

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