2. The ink anti-counterfeiting
Paper money printing using a large amount of special ink to anticounterfeiting .Interferometric scratch ink is a kind of ink that we usually see .That ink has the effect of the metal and pearly luster, ink color piece usually show a pair of color printed on paper, such as green, blue, green, green, magenta, green, etc., if the ink imprinting inclined to a certain Angle, light observation, the printed part can transition from one color to another color. The ink anti-counterfeiting is very easy to recognize, and because it has the effect of dynamic change, so I can't use hd equipment such as copiers, color scanner to copy. When coupled with the ink manufacturing process is complex, professional technology, equipment investment, expensive can fake sexual is low, so there are a number of money to use the color printing ink. Such as, 100 yuan left 100 words, look green, the side is blue; 50 $50 words, look for the gold, the side for the green; French francs color ink printed on look for the green color piece, the side to blue.
Another kind of anticounterfeiting ink colorless fluorescent ink. In general may not get the attention.But under the uv light,it will present glaring colour. Appeared such as the upper left uv light rectangular "100/50/20/10/5", a bright orange fluorescence. Some counterfeit money word fluorescence under ultraviolet light will appear, but the color depth and fluorescence intensity has a large gap, colour and lustre is dim.
There is a printing ink looks the color is not bright, but have the detect the magnetic response with instrument .Some counterfeit detector according to the principle of the design and manufacture. At the left corner of RMB there have a double color cup, the horizontal number is printed in magnetic ink. Dollar have magnetic at the positive gravure anticounterfeit printing ink , magnetic detector can detect the magnetic.
for more Security Ink, pls see http://www.smarol.com/anti-fake-pigment-ink.html
