Bills can be said to be one of the most closely related to people's daily life. From the commonly used banknotes, bonds, industrial and commercial tax invoices, stocks, checks, securities, stamps, and tickets for various activities, etc., directly related to personal interests. The bill is not only a voucher, but also has its special collection value in the collectibles market. With the development of high-quality image input and output devices, especially the emergence of high-precision color inkjet, laser printers, and high-precision color copiers, operators can conveniently cut and stitch digital information, adjust brightness, contrast, and color , Adding changes to the background and text makes it easier to counterfeit checks and other bill printing. Traditional anti-counterfeiting technology has been unable to meet the demand. In order to prevent such risks, the design and production of bills put forward higher-level requirements on anti-counterfeiting technology.
The latest anti-counterfeiting technology must first be unique, so that the corresponding technology cannot be obtained from elsewhere; furthermore, the technology is difficult to forge. Digital watermarking technology is an effective method, it is an important research direction of information hiding technology. Digital watermarking technology will not change the visual image of bills, and can satisfy bill design experts to maximize the creativity. At the same time, it has the world's most advanced, safest and most advanced anti-counterfeiting standard.
1. The current status of bill anti-counterfeiting China's bill anti-counterfeiting printing technology involves many scientific fields, such as optics, chemistry, electromagnetism, computer technology, spectroscopy technology, graphic code technology, etc., which belongs to a cross-edge science. The current anti-counterfeiting technologies are as follows:
â‘ Paper anti-counterfeiting: With the rapid development of papermaking technology in China, paper with anti-counterfeiting function has been continuously applied to bill production, such as: watermarks, visible and invisible fibers, security thread paper, etc. These are some of our more common There are widely used anti-counterfeiting technologies, and there are also anti-copy papers. When we identify these technologies, some are directly visible to the naked eye, some are performed by instruments, and some are identified by comprehensive means. These are the first-line anti-counterfeiting, second-line anti-counterfeiting and third-line anti-counterfeiting in the industry.
â‘¡Ink anti-counterfeiting: In bill printing, anti-counterfeiting ink can be divided into colored fluorescent, colorless fluorescent, infrared ink, photochromic, temperature change, anti-alteration, drip disappearing ink, etc. These inks use different identification features to form different The anti-counterfeiting scheme uses the first-line, second-line and third-line described above to perform anti-counterfeiting.
â‘¢ Plate-making anti-counterfeiting: plate-making anti-counterfeiting is to use some professional software to design some anti-counterfeiting shading. These shadings are difficult to be copied to a certain extent. From this point, anti-counterfeiting purposes are achieved. The more common ones are: Tuanhua, miniature text, Latent images, unlocking, variable line width, etc. Shading anti-counterfeiting is based on lines for anti-counterfeiting, lines can produce rich changes, can prevent forgery and scanning, increase the added value of the bill, of course, use anti-counterfeiting shading for design and output At the time, the requirements on the computer are relatively high. At present, it is a relatively extensive anti-counterfeiting method, which is mainly used in documents, certificates, securities, etc.
â‘£Comprehensive anti-counterfeiting: In the field of bill printing, the most comprehensive anti-counterfeiting technology is the combination of anti-counterfeiting paper, anti-counterfeiting ink, and plate-making anti-counterfeiting. The integrated anti-counterfeiting technology combines the advantages of three anti-counterfeiting methods, which brings great difficulties to counterfeiting Of course, its added value is even higher.
⑤ Anti-counterfeiting holographic logo positioning hot stamping technology. The technical difficulty of positioning hot stamping is very high. It requires printing manufacturers to have precise positioning hot stamping equipment. All general holographic anti-counterfeiting technologies such as pixel holography, true color synthetic encryption micro-engraving embossing and other technologies can be used on hot stamping labels. Play an excellent anti-counterfeiting effect.
â‘¥ Rainbow printing anti-counterfeiting technology. Using rainbow printing anti-counterfeiting technology, according to the requirements of bill printing, multiple colors can be printed at once and the intermediate colors are soft. The rainbow printing effect is difficult to achieve with multi-color overprinting, and it is difficult to see the exact position of the various color partitions in the ink fountain in the bill. Even if the counterfeiter imitates the rainbow printing method, it is difficult to determine the partition spacing, which increases The difficulty of counterfeiting.
In recent years, China has made tremendous progress in the development of anti-counterfeiting materials and anti-counterfeiting printing technology, such as bill special anti-counterfeiting printing technology, DNA anti-counterfeiting technology, microtext printing anti-counterfeiting technology, etc. have been applied to commercial bill printing, and have achieved ideals Effect.
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