One, paper security

Paper is the material basis for printing various securities. Some special papers manufactured using special processes basically have security features. The anti-counterfeiting technologies used in special papers are:

1. Watermark paper

During the manufacturing process, watermark paper can use technical means to incorporate the required logos and patterns into the paper. These patterns are not easy to see under normal circumstances, and can only be seen against strong light and are recognized by the world’s national security experts as An effective anti-counterfeit technology, most of the country's banknotes, important international documents, installation drawings and various tickets are also printed with watermark paper. In addition to being used in currency paper, watermarks have also been widely used in other ticket papers. The position of the watermark in the paper is fixed, not fixed and semi-fixed. In the manufacturing process, it integrates complicated processes such as design, engraving, web-making, and papermaking, and therefore often makes counterfeiters useless. Checking the watermark is also one of the most effective means to identify true and false.

2. Security line

The safety line refers to placing a gold or plastic line in the middle of the paper during papermaking. The earliest use of the security line was special gold wire. Now plastic wire has been used and it has been developed into various kinds, such as miniature letter security wire and fluorescent security wire. The shape of its safety line is straight, wavy, zigzag and so on.

3. Red and blue fiber or color points

In the papermaking process, red and blue fibers or colored flakes (dots) are incorporated into the pulp or are scattered on the surface of the paper before the paper is unshaped, and are fluorescently reflected under ultraviolet irradiation. The red and blue fiber yarns and the color dots have a fixed position and a non-fixed position in the paper.

4. Anti-copy paper

After copying this kind of paper, "copy" and "invalid" words will appear, which can effectively prevent color from copying important documents. Another type of full-absorption copy-proof paper has a blue or brown-red appearance. Only the light on the paper can be seen through the light, and the copy is dark.

5. Non-fluorescent paper

General paper is fluorescent under UV irradiation. As a result, banknote printing paper and some valuable securities or notes are printed using special paper without fluorescence. For example, the paper bases of the national banknotes, passports, and some tickets are not fluorescent, so it is easier to reveal additional fluorescent graphics.

Second, book printing technology

For example, multi-color serial printing, multi-color serial printing, also known as cross-color printing or rainbow printing, is generally used more than the letterpress printing, it is based on the requirements of the printing product, after placing the partition in the ink tank, and then separate in different compartments Put in a variety of hue inks. Under the string action of the skein roller, the adjacent ink is mixed and transmitted to the 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 distance of the ink tank partition from the print, it can also play a certain anti-counterfeiting effect. If such a process is applied to large-area shading printing, its anti-counterfeiting effect will be more prominent.

Third, security ink

1. UV fluorescent ink

Special ink that emits visible light when exposed to ultraviolet light.

2. Daylight excitation color change security ink

Anti-counterfeit printing ink that emits visible light under sunlight. The color change effect can be changed from colorless to purple, blue, yellow, etc. It can also be designed to change from colored to colorless.

3. Thermal security ink (also known as thermochromic security ink)

Under the effect of heating, the ink can change color effect. According to the different temperature required for discoloration, can be divided into hand-temperature color anti-counterfeiting ink and high-temperature anti-counterfeiting ink. According to the difference in color change, it can be divided into single color reversible, multi-color irreversible and multi-color irreversible thermal ink.

4. Reaction color change ink

Various chemical substances added to the ink, under certain conditions, can produce various chemical reactions, so that the ink changes color, to achieve anti-counterfeiting purposes. Part of the heat-sensitive anti-counterfeit inks, pressure-sensitive color-changing inks, and humidity-sensitive color changes are all color-changing inks.

5. Magnetic ink

It is a special ink made by mixing magnetic iron oxide powder into ink. At this stage, it is mainly used to print magnetically encoded letters and symbols of bank tickets, and has the effect of recording and storing information. A magnetically encoded ticket can be inserted into a magnetic code reader to identify authenticity.

6. In addition to altered ink

If a correction is made at the corresponding site, some kind of password will appear. This type of ink is mainly used to print securities such as cheques, bills of exchange and documents. If someone alters or eliminates the original figures on the denominations of bills of exchange, it will immediately appear as "Voided."

Fourth, bar code anti-counterfeiting technology

Product barcodes are codes of commodities designed by humans for effective management of computers and other commodities. If we can reasonably use commodity technologies, including reasonable selection of the carrier of the barcode, a reasonable choice of printing methods and printing machines, a reasonable choice of the location of printing, etc., then it is possible to make the commodity barcode technology have an anti-counterfeiting effect.

Due to the greater amount of information, 2D barcodes are highly resistant to counterfeit by computer and inkjet printers. There is also the application of checkma, which can also be used for anti-counterfeiting through a formula operation, followed by a specific number after a consecutive number.

V. Code anti-counterfeit identification and telephone identification system

The code anti-counterfeiting identification and telephone identification system is to identify all the records of all network access products in the anti-counterfeit data center library by setting a random password on each product, so that consumers can use phone, computer and other tools to verify the correctness of the password. The authenticity of the product. This anti-counterfeiting technology is implemented on the same physical object to achieve a high degree of anti-counterfeiting.

Six, pattern design anti-counterfeiting

Plate design, also known as flower ball design, guilloche design, shading background design.

This is one of the oldest and oldest anti-counterfeiting technologies. This background image can be seen on familiar banknotes, passports, and cheques.

The current security graphic design system is combined with computer technology, and can be designed according to the user's own style. The complete pattern background and related texts with distinctive personal characteristics are designed, such as flower balls, miniatures, miniatures, and anti-scanning drawings. Text, anti-copying graphics, embossed patterns, etc. These graphics and texts are designed with lines and spot colors, which can effectively prevent the separation of electricity, photography, and other traditional means of color separation and color reproduction after copying and play a significant anti-counterfeiting effect. This is exactly what the criminals are driven by the spurious profits, so this security graphic design is still widely used in the production of banknotes, cheques, national important documents, securities, etc.

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