Summary of the most popular special printing techn

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Overview of special printing technology

I. paper anti-counterfeiting

paper is the material basis for printing various securities. Some special papers manufactured by special processes basically have anti-counterfeiting characteristics. The anti-counterfeiting technologies used in special papers mainly include:

1. during the manufacturing process of watermark paper

water printing paper, technical means can be used to make the required marks, patterns, etc. into the paper. These patterns are not easy to see under normal circumstances, It can be seen only when facing strong light. It is recognized as an effective anti-counterfeiting technology by anti-counterfeiting experts all over the world. Banknotes, important international documents, facility drawings and various tickets in most countries are also printed with watermark paper. Besides being used in currency paper, watermark has also been widely used in other ticket paper. There are fixed, unfixed and semi fixed watermarks in the paper. In the manufacturing process, it integrates the complex process of design, mold carving, paper making, and so on. Therefore, it often makes counterfeiters helpless. Checking the watermark is also one of the most effective means to identify the true and false

2. safety line

safety line requires active understanding. It refers to placing a gold line or plastic line in the middle of the paper in the papermaking process. Special gold wires were first used as safety wires, but now plastic wires are used and special tools have been used to hold samples, which have developed into a variety, such as miniature letter safety wires, fluorescent safety wires, etc. The shape of the safety line includes straight line, wave shape, sawtooth shape, etc

3. red and blue fibers or color dots

in the process of papermaking, red and blue fibers or color chips (dots) are mixed into the pulp, or scattered on the surface of the paper before the paper is finalized, and there is fluorescence reflection under ultraviolet radiation. There are two kinds of fixed position and unfixed position for red and blue fibers and color dots in paper

4. anti copy paper

after copying, the words "copy" and "invalid" will appear, which can effectively prevent color copying of important documents. Another kind of full absorption anti copy paper is blue or brownish red in appearance. The pictures and pictures on the paper can only be seen through light, and the copy is dark

5. non fluorescent special paper

general paper shows fluorescence under UV irradiation. Therefore, non fluorescent special paper is used to prevent counterfeiting of banknote printing paper and some securities or to obtain an integrated industrial 4.0 production system bill. For example, the paper bases of banknotes, passports and some tickets in various countries have no fluorescence, which makes it easier to reveal the fluorescent pictures and texts with additional secret marks

II. Printing technology

for example, multi-color serial printing, also known as serial color printing or rainbow printing, is usually printed by relief printing machine. It is based on the requirements of printing products, after placing a partition in the ink tank, and then putting a variety of color inks in different partitions. Under the action of the inking roller, the ink of adjacent parts is mixed and then transmitted to the printing plate. With this printing process, multiple colors can be printed at one time, and the middle transition is soft. Since it is difficult to see the placement distance of the ink tank partition from the printed matter, it can also play a certain anti-counterfeiting role. If this process is used in large-area shading printing, its anti-counterfeiting effect will be more prominent

III. anti counterfeiting ink

1. UV fluorescent ink

a special ink that can emit visible light under UV irradiation

2. color changing anti-counterfeiting ink excited by sunlight

anti counterfeiting printing ink that can emit visible light under sunlight. The color change effect can change from colorless to purple, blue, yellow and other colors, and can also be designed to change from colored to colorless

3. heat sensitive anti-counterfeiting ink (also known as thermochromic anti-counterfeiting ink)

ink that can change color under the action of heating. According to the temperature required for color change, it can be divided into hand temperature color change anti-counterfeiting ink and high-temperature color change anti-counterfeiting ink. According to the difference of color changing ways, it can be divided into single color changing reversible, multi color changing irreversible and multi color changing irreversible heat sensitive anti-counterfeiting inks

4. reactive color changing ink

various chemical substances added to the ink can produce various chemical reactions under certain conditions, so as to change the color of the ink and achieve the purpose of anti-counterfeiting. Heat sensitive anti-counterfeiting ink is a part of pressure-sensitive color changing ink and humidity sensitive color changing ink

5. magnetic ink

is a special ink made by mixing magnetic iron oxide powder into the ink. At present, it is mainly used to print magnetic coded words and symbols of bank tickets, with the effect of recording and storing information. Put the ticket printed with magnetic code into the magnetic code reader to identify the authenticity

6. remove the correction ink

if the correction is made at the corresponding position, a certain password will appear. This ink is mainly used to print cheques, bills of exchange, documents and other securities. If someone alters or erases the original figure on the face value of the bill, the word "void" will appear immediately

IV. bar code anti-counterfeiting technology

commodity bar code is a kind of code of commodities, which is designed by human beings for the effective management of commodities such as computers. If we can reasonably use commodity technology, including reasonably selecting the carrier of bar code, reasonably selecting the printing method and printing machine, reasonably selecting the printing position, etc., it is possible to make commodity bar code technology have anti-counterfeiting effect

2D barcode fully agrees with your view on the development of bilateral relations. Due to the greater amount of information, it has strong anti-counterfeiting through the processing of computers and inkjet printers. There is also the application of calibration Ma, which can also play an anti-counterfeiting role by a formula operation, followed by a specific number after a continuous number

v. code anti-counterfeiting identification and identification system

code anti-counterfeiting identification and identification system is to set a random password on each product, archive all records of all incoming products in the anti-counterfeiting data center database, and allow consumers to use computers and other tools to check whether the password is correct to identify the authenticity of products. This anti-counterfeiting technology is implemented on the same physical object to achieve a high degree of anti-counterfeiting

VI. pattern design anti counterfeiting

pattern design, also known as flower ball design, twisted rope decoration design and shading background design

this is one of the oldest and longest lasting anti-counterfeiting technologies. This kind of background picture and text can be seen on the familiar banknotes, passports and cheques

the current security graphic design system is combined with computer technology. It can be designed according to the user's own style to design a complete graphic background and related characters with distinctive personalized characteristics, such as flower ball, miniature, miniature, anti scanning graphics, anti copying graphics, relief graphics, etc. These pictures and texts are designed with lines and printed in spot color, which can effectively prevent color separation printing and color copying after copying by traditional means such as electric separation and photography, and play an obvious anti-counterfeiting role. This is exactly what criminals driven by exorbitant profits do not like. Therefore, this secure graphic design is still widely used in the production of banknotes, cheques, important national certificates, securities, etc

reprinted from: printed in Shenzhen

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