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  2. Invisible ink - Wikipedia

    en.wikipedia.org/wiki/Invisible_ink

    Invisible ink, also known as security ink or sympathetic ink, is a substance used for writing, which is invisible either on application or soon thereafter, and can later be made visible by some means, such as heat or ultraviolet light.

  3. UV marker - Wikipedia

    en.wikipedia.org/wiki/UV_Marker

    UV marker with UV led lamp. 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.

  4. Aburidashi - Wikipedia

    en.wikipedia.org/wiki/Aburidashi

    Aburidashi is a ninja technique of sending secret messages using a form of invisible ink. [1] The technique uses ink made of juice extracted from soaked and crushed soybeans . [ 1 ] The message becomes visible to the recipient by heating the paper.

  5. Fugitive pigment - Wikipedia

    en.wikipedia.org/wiki/Fugitive_pigment

    1887 British Consular Service revenue stamp printed in green fugitive ink. Fugitive pigments are impermanent pigments that lighten, darken, or otherwise change in appearance or physicality over time when exposed to environmental conditions, such as light, temperature, humidity, or pollution.

  6. Do you need full-coverage car insurance? What it is, when it ...

    www.aol.com/finance/full-coverage-car-insurance...

    🚗 Here’s what the 10x rule might look like for that same 2010 Ford sedan worth $3,000 with full coverage costing $800 a year: 10x rule 🟰[annual premium cost] ️10 > [car’s value] $8,000 ...

  7. Rick Pitino dons replica sweater to honor legendary St. John ...

    www.aol.com/sports/rick-pitino-dons-replica...

    One week after the death of Lou Carnesecca, Rick Pitino found the perfect way to honor the legendary St. John’s men’s basketball coach.. Pitino had his tailor create a replica of the iconic ...

  8. 7 of the most famous American investors - AOL

    www.aol.com/finance/7-most-famous-american...

    America’s top investors have achieved double-digit returns for years, sometimes decades. Following these top investors is a great strategy for two reasons.

  9. Ink eraser - Wikipedia

    en.wikipedia.org/wiki/Ink_eraser

    Chemical ink erasers break down royal blue ink by disrupting the geometry of the dye molecules in ink so that light is no longer filtered. The molecules are disrupted by sulfite or hydroxide ions binding to the central carbon atoms of the dye. [3] The ink is not destroyed by the erasing process, but is made invisible.

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