Anti-counterfeiting in printing technology requires sophisticated printing equipment and supporting ink, paper, etc. If you can monopolize a set of high-end, sophisticated computer typesetting and printing equipment and raw materials or others do not master a certain process or do not have enough financial resources to imitate it, printing anti-counterfeiting technology can fully play its role.
(1) Engraving and plate making: Due to the different knife skills, styles, and unique skills of hand-engraved plate making, the depth, arc, and angle of the engraving lines are difficult for others to imitate, and they are absolutely lifelike. Even the author himself can It is difficult to carve two identical plates, because hand-engraving reveals the authenticity in the subtleties, so it became the best anti-counterfeiting technology in the early days and can still be used today. The emergence of technologies such as photoengraving, optical scanning, laser engraving, computer-controlled machine tool engraving, and photosensitive seal making has made it easier to imitate engraving images, and the imitation is very realistic.
(2) Patterns created by computers: special color electronic drawing and publishing software are used to produce particularly complex, subtle, exquisite, and high-resolution print shading. This kind of shading is difficult to copy manually, phototypesetting or scanning, such as very complex embroidery, arbitrary geometric figures, single line, composite or guilloche closed lace, embroidery and other graphics, which can also be guilloched and deformed. , or made into square, concentric circles, intaglio, flat line relief, curved relief, multi-color relief, multi-color single embedded relief, etc. Text can also be embedded in the flowers, and the shading graphics can also be shifted and gradient. In short, one can let one's rich imagination create unprecedented graphics that are difficult to imitate.
(3) Gravure printing: The pictures and texts on the gravure plate are lower than the layout of the printing plate, and the concave patterns are also different in depth to express the height of the pictures and texts and the thickness of the ink, so the printing The resulting pattern can become a three-dimensional image with a strong three-dimensional effect and a concave-convex feeling when touched by hand. The bank name, denomination, and braille on the front of my country's 50 yuan and 100 yuan RMB are all gravure printed.
(4) Rainbow printing: The main color or background of the pattern is composed of different colors, but the color transformation of the lines or images is a gradual transition without obvious boundaries, just like the gradient of the seven colors of the rainbow in the sky. The color of the background shading on the front of my country's 100-yuan yuan gradually transitions from orange to orange-red, green, and blue, that is, this technology is applied.
(5) Pattern docking: This is a shading printing technology, which has two forms. The first is full-page printing of patterns. When the currency or bills are cut to the specified size, the original pattern on the shading of the cut edges is incomplete. However, if the two cut edges are butted together, a complete shading can be formed. picture. For example, the shading patterns on the left and right sides of the front of my country's 1990 edition of the 100-yuan RMB and the thousand-yuan coupons issued by the HSBC Bank in Hong Kong all use this technology. The second type is to print trimming marks on the four sides of the printed product. These marks are folded face-to-face so that the lines match perfectly, such as Dutch guilder banknotes.
(6) Opposite printing: The patterns on the front and back of banknotes or other bills can completely overlap when viewed through light, or partial patterns on the front and back can be observed through light and then complement each other to form a complete New pattern. Complementary printing on both sides is already seen in the D mark on German mark banknotes. The portrait is found on the front and back of the French franc. my country's 1980 and 1990 editions of 5 Yuan, 2 Yuan and 1 Yuan have adopted counter-printing technology for the pattern next to the Braille text on the left side of the front. my country's fifth set of 100-yuan coupons (1999 version) has a circular pattern on the lower left side of the front and the lower right side of the back. When viewed against the light, the yin and yang of the front and back graphics complement each other, forming a complete ancient coin pattern with opposite seals.
(7) Wiring printing: When two colors are connected to each other on the same line of the ticket pattern, the two colors at the connection cannot be separated or overlapped. This requires sophisticated equipment and superb skills. level of craftsmanship. Our country has been able to complete the precise docking of four color patterns at one time.
(8) Multi-color overprinting: On the basis of wiring printing, the same pattern is overprinted with several colors of ink, thus forming an overlap of multiple colors, making the pattern colorful. This is a very precise offset printing technology that is generally difficult to copy.
(9) Microprinting technology: extremely tiny text that can only be seen under a magnifying glass is printed on what looks like a solid or dotted line to the naked eye. Of course, microtext can also be printed on the components of the drawing. on lines or points. Microprinting can be used not only for general tickets, but also for the security lines of banknotes or passport papers for comprehensive anti-counterfeiting.
(10) Refractive latent image: This is a gravure shadow technology that uses the different tilt effects of horizontal and vertical gravure lines on light to create two graphics and texts on the same part of the paper. When you look straight at this kind of graphics and text against the light source, you will see one type of graphics and text. According to the design, if the paper is rotated horizontally 45 degrees or 90 degrees, it will transform into another type of graphics and text. This technology has been used on the passports of Canada, Sweden, the Czech Republic, and other countries. This technology has also been promoted to society in our country. The oval pattern on the upper right side of the front of my country's fifth set of 100-yuan coupons (1999 version) can be rotated at the above angle to reveal the invisible denomination number 100.
(11) Invisible image: Taking advantage of the variability of the depth of machine-engraved platemaking lines, the printed pattern looks like a graphic at first glance, but upon closer inspection, it also hides another or multiple images, such as 500 Swiss Rear view of franc. You can also add some subtle feature images during design. These graphics are easy to produce illusions when observed with the naked eye; when imitated using photographic platemaking or laser phototypesetting, they will be deformed and blurred, causing some features to be lost.
(12) Image scrambled printing: Using an electronic program-controlled camera to scramble, distort or overlap the captured image with other graphics, etc., so that the hidden graphics must use a decoder to identify the original image. Because the graphics are distorted, the prints cannot be copied or reproduced with ordinary scanners.
(13) Sesame Intelligent Code: Use images to perform secondary encryption and micronization to form dot matrix codes. The graphics need to be seen under a high-power magnifying glass. This is a patented technology of Shenzhen Zhongxuan Technology. Features: Quick and convenient identification, irregular distribution, unable to be copied, invisible to the naked eye, strong resistance to damage, high anti-counterfeiting strength, low cost, and strong scalability.