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A counterfeit banknote detection pen is a pen used to apply an iodine-based ink to banknotes in an attempt to determine their authenticity. The ink reacts with starch in wood-based paper to create a black or blue mark but the paper in a real bill contains no starch, so the pen mark remains unchanged.
The International Ink Library and its Digital Ink Library are an FBI forensic database of inks. It is used to identify writing instruments, makes, models, ink types, and document authenticity. [ 1 ] It contains over 15,000 samples of pen, marker, and printer inks dating from the 1920s.
A pen is a handheld device used to apply ink to a surface, usually paper, for writing or drawing. [1] Additional types of specialized pens are used in specific types of applications and environments such as in artwork, electronics, digital scanning and spaceflight, and computing.
A combination of usually black ink characterizes the style, typically featuring intricate fine-line work (though some designs are a bit bolder) that spreads outwards to form branch-like designs.
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.
The original luminous systems used red lenses and greenish ink on the back of red cards, though more recent variations use chemicals [clarification needed] applied to the cards. Video-luminous marking - Video-luminous cards use marks that can not be seen by the human eye, even through a luminous filter. The marks can only be read by using ...
The Ink Black Heart is a doorstopper – over 1,000 pages in paperback, or almost 33 hours if you prefer the audiobook. Here, it is condensed to just four hours, which cannot do justice to the ...
Printer tracking dots, also known as printer steganography, DocuColor tracking dots, yellow dots, secret dots, or a machine identification code (MIC), is a digital watermark which many color laser printers and photocopiers produce on every printed page that identifies the specific device that was used to print the document.