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  2. 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 ...

  3. Replacement banknote - Wikipedia

    en.wikipedia.org/wiki/Replacement_banknote

    1957 one United States dollar star note (Star precedes serial number) The United States and India [7] use " " in the serial number to mark a replacement banknote. These are known as "star notes". These were also used by Australia until 1972. Canada used " " at the beginning of serial numbers on its replacement banknotes until 1975. They are ...

  4. Emanuel Ninger - Wikipedia

    en.wikipedia.org/wiki/Emanuel_Ninger

    Ninger began counterfeiting in 1878, [2] and by 1879 the Treasury redemption bureau was aware of his work. [5] Not having any clues as to Ninger's identity, he was named "Jim the Penman" by the Secret Service. [6] Beginning with a $10 bill, he moved on to $20s and $50s, and later $100s. [2] His first $100 was spotted by the Treasury in November ...

  5. The average tuition for one year at a public college was $400 in 1970, or $2,800 in 2022 dollars. But in 2022, public college tuition cost $11,400 per year, not $2,800.

  6. Art and engraving on United States banknotes - Wikipedia

    en.wikipedia.org/wiki/Art_and_engraving_on...

    It was not until 1877 (19 Stat. 353) that the Bureau of Engraving and Printing was given funding for labor, paper, transportation, and other expenses with the provision that all work be conducted on site, and for a price commensurate with that of the private bank note companies. On 1 October 1877, the BEP took over the production of both United ...

  7. Retractable pen - Wikipedia

    en.wikipedia.org/wiki/Retractable_pen

    Pen clicking is repeated pressing of the button which produces a clicking sound. [5] Normally, the button is only pressed to expose the nib of the pen for writing. The resultant noise varies in tone, dynamic and timbre depending on the size and make of the pen. When the noise is heard repeatedly, it can have a psychological effect on the doer ...

  8. Gel pen - Wikipedia

    en.wikipedia.org/wiki/Gel_pen

    Gel pens. Compared to other inks, gel ink has higher melting point viscosity, which supports a higher proportion of pigments in the medium.The pigments are typically copper phthalocyanine, carbon black and iron oxides, and the gel is made up of water and biopolymers, such as xanthan gum and tragacanth gum, as well as some types of polyacrylate thickeners.

  9. History of Canadian currencies - Wikipedia

    en.wikipedia.org/wiki/History_of_Canadian_currencies

    The new Canadian government issued its first notes in 1870. The first issue was in denominations of twenty-five cents (nicknamed a "shinplaster"), one dollar and two dollars. The twenty-five cent note featured Britannia, the one-dollar note featured Jacques Cartier, and the two-dollar note featured General James Wolfe and the Marquis de ...