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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.
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.
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.
President-elect Donald Trump said he is looking to pardon his supporters involved in the attack on the U.S. Capitol on Jan. 6, 2021, as soon as his first day in office, saying those incarcerated ...
<includeonly>: the content will render only there, and will not render here (like invisible ink made visible by means of transclusion). <onlyinclude>: the content will render here and will render there, but it will only render there what is between these tags. There can be several such section "elements". Also, they can be nested.
In these murky depths lives a creature that can make itself invisible. The glass squid from the family Cranchiidae is nearly transparent with the exception of a few body parts, such as its eyes ...
In an appearance on "The Pacman Jones Show," the Hall of Famer and Colorado coach made it clear what he thinks the future holds for his son.
Scantegrity II ballot and decoder pen. Left: Unmarked optical scan bubble. Right: Marked optical scan bubble revealing confirmation code "FY" The Scantegrity II voting procedure is similar to that of a traditional optical scan voting system, except that each voting response location contains a random confirmation code printed in invisible ink. [4]