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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.
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.
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.
A smelling screen is a type of digital scent technology, unveiled in 2013, that combines a display screen, similar to a television or computer monitor, with an odor emitting device capable of pinpointing the smell to a specific portion of the displayed image.
Soaking your shower head in vinegar overnight. Grandma isn't completely wrong here. However, we'd like to offer a modification to the process of cleaning your shower head with vinegar.
Henry accidentally washes his and June's clothes with invisible ink, causing them to become naked. In Prometheus and Bob, Prometheus tries to teach Bob how to ice skate. June bleeps out non-offensive words Henry says. Life with Loopy: Loopy enters the TV while Larry is asleep. Henry makes the artists give him chest hair.
The Capri Blue Fir & Firewood Candle has a woody fresh scent that will make your home smell nice without being too in-your-face. This particular candle is an Anthropologie exclusive, and it comes ...
New details about a study that warned against black plastic spatulas and other kitchen tools have come out. (Getty Creative) (Анатолий Тушенцов via Getty Images)