Zhang Diancheng: What is the standing invitation to visit Russia refused JinZhengEn printing technology point of view, stamps, and the renminbi, are a special print it, itself does not have much value. Then, as an ordinary print, stamp, but also how it print?
In the stamp printing, our hand-carved intaglio technique is world class. Wind knife hand-carved, exquisite artistic style is unmatched by other plate method. Portrait of bills and foreign countries has always been the use of hand-carved, hand-carved features stylized performance figures. Hand-carved dark version of the printed product lines ink thickness, feel good, strong security. But there are two problems hand-carved, first low efficiency, is not suitable meter for rapid production needs, in addition, must be used as hand-carved knife, carve the version of profiling in the depth direction of the cross-section is in the form a "V" notch This shape of the grooves of the ink reservoir is not very good, if that is the use of concave Wiping method, the ink is likely to be struck within the groove, the printed ink on the line was not very full and thick. These are two issues that must be addressed. Efficiency in solving problems, when you are abroad carving portrait is the portrait zoom to enlarge the image copperplate etching, after the hand-carved larger portrait repair copperplate as a template; use this template as a mold, using shrink machine shrink engraved on the plate carved portraits to meet the specifications. Sensible heat, copper plate engraving things easy and efficient than direct carving. meter As for solving the groove "V" shape problem, we need to tap the potential for corrosion gravure process. Intaglio etching process is to directly open single ugly graphic film coated with a photosensitive material, copper plate etching, copper plate low hardness, high hardness can be pasted to other media in the back of the copper plate. Copper plating layer or charge to the harder version lining. The single open after corrosion treatment by improving the strength of the copper plate with a hot press pressure in 1mm thick plastic sheet, plastic plate by precision cutting, high-frequency welding to make large sheets of plastic plates, with a large piece of plastic meter version Total copper version, the ability meter to turn a nickel copperplate letterpress, gravure can finally turn a nickel for use on the machine. This intaglio etching process produced its version of profiling recess was "U" shaped, ink reservoir performance, solid ink printed product lines, feel strong. And by etching method can produce very small text and fine lines, micro text size now been able to do 150-m, such a small gravure meter microfilm can only be observed under a magnifying glass, it is clearly visible.
Laser holographic anti-counterfeiting meter technology is a high-tech anti-counterfeiting technology emerged in the 1980s, it is scattered, reflected generated when the role of the use of light and matter, transmission, meter diffraction, meter interference, absorption and other basic rules, some kind of special meter visual effects. Currently, the use of optical anti-counterfeiting technology is the use of a multilayer dielectric film structure of thin film interference effects, the grating structure and use of information for various types of laser bare concept of holography. Molding process is characterized by the emergence of such a low-cost high-volume manufacturing meter of laser holograms can be achieved, meter with the hologram itself contains a wealth of information, but holographic label can not simply use the ordinary photolithography and printing technology to replicate, therefore, molded holograms quickly find application in anti-counterfeiting security.
Laser holographic anti-counterfeiting technology will be applied to the stamp printed matter in the late 1980s, the. Stamps with holographic security world's first pattern is October 18, 1988 by the eight shillings stamps Austria sender and stamp on the International Chamber of Commerce meter export products exhibition on display, most welcome. Its central office three hologram stamp, then a sailboat shape by the letters A and MADEINAUSTRIA like, a symbol of the outlet means. Later in 1989, it said on December 3, issued by the US Postal Department of 25 cents prepayment envelope (affixed with a square opening in the top right corner meter of the envelope hologram, produced by the American Bank Note Company hologram), which holograms are boarded a spacecraft orbit space station.
Next Finland, Hungary, Poland, Canada, Mongolia, Australia and many other countries have issued stamps that anti-counterfeiting technology, holographic anti-counterfeiting technology has played a huge role in the production of counterfeit stamps. meter China in 1996, also issued this stamp, the first is the "Hong Kong 98" Stamp issued a souvenir. Close to a small circle of holographic pattern covers the screen is a panda holding bamboo stamps this is a green bamboo picture. Later, to celebrate the 22nd China Stamp Exhibition, on July 18, 1996 and issued stamps with holographic pattern. Stamp pictures are flying around the Earth's figure statue, surrounded by stamps envelopes around aviation, aircraft, ships, trucks and other patterns. In addition, China, Hong Road on February 15, 1994 issued two post hologram stamps postcard. Holographic stamp on a postcard pattern for the 一枚 1685 Victorian women head, posted this picture postcard stamp is 1920 Hong Kong waterfront, the hologram is another postcard on a British Queen Elizabeth II Avatar, this picture meter postcard of Hong Kong in 1933 waterfront.
Today, the network changes meter as a new anti-counterfeiting technology, is attracting attention. Is increasingly being used for security printing tickets, with good results. meter The principle is the continuous tone images and text, graphics, etc. converted into tiny dotted line has a certain direction by changing its angle to form a latent image. This pattern can not be seen with the naked eye, but a digitized scan will appear. FM network is to convert the images into tiny idea, relying on the intensity meter of the idea to show the depth of the image density. If copier will produce moire. The United meter States has being a part of the stamps used this kind of security methods. Stamps overall direction offset outlets meter are rules, only part of the changes in the latent image dot direction. meter What with the naked eye can not see, but if the indicia detector with a lenticular lens can clearly see it.
With the development of anti-counterfeiting technologies and materials, the future of the security stamp will move toward a higher level of development, it basically can use the ticket meter security branch Tech used materials and techniques, meter of course, meter not as good as the urgent security stamps and banknotes and other security important, because counterfeit stamps in use value (ie mail) is not on a lot of sense, which is mainly due to its relatively meter low face value, while counterfeiters expend energy and not worth the candle. But the real significance lies in the security stamp collectible treasures, however, because it is the value of the collection and the age-old and this number is proportional to the number of species, if the year away, the stamp paper and when the inevitable fraud freshly printed differently , the counterfeit products are likely to be found, loses its value; and if counterfeiters printed in large numbers, it will lose the significance of rare species and, therefore, meter it was found that air easily meter lose its value. Overall, therefore, there is no stamp counterfeiting banknotes and other security importance. But this does not say that the security stamp is not important, this case appears counterfeit rare stamps from the world would be able to explain the problem.
Comments Important: guard against false winning information Sina Corporation
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