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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.
7 tips to make your home smell good While taking out the trash, using a dehumidifier to deal with moisture and opening up some windows can certainly help, here are some other ways to freshen up ...
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.
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 ...
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To make ink, the inkstick is ground against an inkstone with a small quantity of water to produce a dark liquid which is then applied with an ink brush. By adjusting the strength and duration of the ink grinding process, artists and calligraphers may adjust the concentration of the produced ink to suit their tastes.
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 ...