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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.
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.
The clues were not written in invisible ink, which made it easy to accidentally get answers to puzzles. Some of the hints were missing; There were many errors, such as misspellings, mis-capitalizations, formatting issues, and punctuation errors. The clues were not included with The Lost Treasures of Infocom II. However, there was a pay-per ...
Katy Perry made her album Teenage Dream [Deluxe Edition] smell like cotton candy through scratch and sniff technology. In the Pushing Daisies episode "The Smell of Success", olfactory scientist Napoleon LeNez has written a scratch and sniff book for using odours to bring success in the life of the reader. The protagonists investigate a ...
Most of us spend upwards of eight hours per day in bed, either relaxing, sleeping or attempting to sleep. The bad news: dead skin cells, dust mites, germs and body oils that can cause allergies ...
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An unpleasant smell is added to some brands in order to deter abusers. [ 5 ] Companies have worked closely with authorities in order to ensure that all the warnings are duly mentioned on packaging (card and product labels) to inform parents and younger users of the risks associated with inhaling or drinking the fluid.