With the continuous development of the market economy and the integration of the market, fake and shoddy commodities are rampant, harming the interests of consumers and producers. With the rapid development of computer technology, the bar code anti-counterfeiting technology is cleverly applied to the anti-counterfeiting of goods, which can effectively achieve the purpose of not being counterfeited and protecting the interests of consumers.

Bar code is the abbreviation of bar code. It is composed of a group of bars and blanks with different widths and reflectivity, which are combined according to a certain code to represent a group of data symbols. The bar code of the commodity itself does not have the ability of anti-counterfeiting, it is just a code of the commodity, which is designed to use the computer to effectively manage the commodity. However, if we can use bar code technology reasonably, including the reasonable choice of the carrier of the bar code, the reasonable choice of the printing method of the bar code, and the reasonable choice of the printing position of the bar code, we can play the role of anti-counterfeiting.

The first is a reasonable choice of bar code printing method. The bar code is read by the computer, which requires the high quality of the printed goods. The higher the quality of the printed goods, the higher the required printing equipment and precision. Similarly, the higher the price of the equipment, the counterfeiters are unable to buy high-precision equipment, which has an anti-counterfeiting effect on the goods, and the higher the price of the equipment. The better the anti-counterfeiting effect.

The second is the correct design and use of bar codes on the packaging to achieve the purpose of anti-counterfeiting:

1. invisible bar code

The invisible bar code can achieve the purpose of neither destroying the overall effect of packaging and decoration nor affecting the characteristics of the bar code. Similarly, after the invisible bar code is invisible, it is difficult for ordinary counterfeiters to imitate, and its anti-counterfeiting effect is very good, and there is no color problem during printing.

several forms of invisible bar code:

(1) Covering invisible bar code

The principle of this invisible bar code is that after the bar code is printed, it is covered with a specific film or coating, so that the bar code after treatment is difficult for the human eye to read. Covered invisible bar code anti-counterfeiting effect is good, but its decoration effect is not ideal.

(2) Photochemically treated invisible bar code

Using optical methods to deal with ordinary visual bar code, so that people's eyes are difficult to find traces after treatment, with ordinary wavelength light and non-specific light can not be read, this invisible bar code is completely invisible, the decoration effect is also very good, but also can be designed into a double anti-counterfeiting packaging.

(3) invisible ink printed invisible bar code

This kind of bar code can be divided into colorless functional ink printing bar code and colored functional ink printing bar code, for the former is generally fluorescent ink, thermochromic ink, phosphorescent ink and other special ink to print the bar code, this invisible bar code in the printing must use specific light, in the bar code identification must use the corresponding sensitive light source, this bar code is originally invisible, the bar code printed with colored functional ink is generally printed with color-changing ink. The invisible bar code printed with invisible ink is the same as the general printing process. However, the problem of anti-aging needs to be solved.

(4) paper invisible bar code

This invisible bar code invisible medium is integrated with the paper after special photochemical treatment. It cannot be peeled off and can only be used for one-time use. It cannot be recognized by human eyes, nor can it be copied by visible light photography or copying. When distinguishing, only a scanner emitting a certain wavelength can be used to read the information in the bar code. At the same time, this scanner is compatible with common black-and-white bar codes.

2. two-dimensional bar code

For ordinary linear bar code can be called one-dimensional bar code, it has many advantages: easy to make, easy to read, fast input speed, high reliability, high degree of standardization of reading equipment, easy to use online with computers and other control equipment, performance tends to be perfect. However, its information capacity is small, and it is necessary to obtain a larger information capacity in its limited plane area. Extending one-dimensional code to two-dimensional bar code is the most effective method.

The anti-counterfeiting principle of the two-dimensional bar code is to encrypt the digital information input by the bar code. For anti-counterfeiting applications, two-dimensional barcodes are very suitable.

3. metal bar code

The bar of the metal bar code is produced by the metal foil after electroplating. Generally, the surface of the bar code is covered with a layer of polyester film. This bar code is read by a special metal bar code reader. The advantage is that the surface is not afraid of stains. Generally, bar codes are read by light reflection, while this bar code is read by electromagnetic waves. Only the distance between the reader and the bar code will affect the reading of the bar code. Its anti-aging ability is strong, and the polyester film on the surface has strong adaptability when used outdoors. The metal bar code can also be made into an invisible code, and an opaque protective film is used on its surface, so that the human eye cannot distinguish the existence of the bar code, thus making a covered metal invisible bar code.

4. two-dimensional metal bar code

Two-dimensional metal bar code is a high-tech multiple anti-counterfeiting new product made through complex technological processes such as coding technology, laser technology, computer technology, encryption anti-counterfeiting technology and photochemical technology. Its multiple anti-counterfeiting functions are as follows: high scientific and technological content and complicated manufacturing process; Can store a large number of words, photos and fingerprints; One bar code and one information, endless changes; Special encryption technology processing, difficult to decipher; Only for one-time use, it is a national patented technology, the only one in the country.

The authenticity detection method of two-dimensional metal bar code: ① hand touch has concave and convex feeling, appearance has three-dimensional feeling, ② can use special bar code reader, ③ scan first, then use computer decryption to identify authenticity, ④ use currency detector to check. Two-dimensional metal barcodes also have the advantages of metal barcodes.

5. implied magnetic code

The principle of implied magnetic code is to make powdery weak magnetic material into magnetic ink, and mix and code copy its mechanical characteristics (such as code bar, code width, code distance) and magnetic characteristics (remanence ratio, coercive force ratio) by offset printing, silk screen printing and other printing methods. It is characterized by the recording material containing trace elements, multi-feature coding, quantitative identification, low cost.

Hidden magnetic code types:(1) magnetic detection bar code;(2) random encoding;(3) watermark magnetic code. The watermark magnetic code is produced in the process of production. After wet and magnetic removal, the computer makes it generate the binary interval of the pattern. After drying, it stays in the magnetic oxide to generate a unique unchangeable 12-digit number. When reading, a special watermark magnetic verification track is added to the ordinary magnetic head to judge whether the watermark magnetic number exists and is correct or not, so as to distinguish the authenticity.

Finally, it is reasonable to choose the printing position of the bar code:

Strict implementation of national standards and reasonable determination of the position of bar codes can also achieve the purpose of anti-counterfeiting. For example, listening containers use two kinds of bar code printing positions for anti-counterfeiting:(1) bar codes are printed on the longitudinal seams of labels. This method can only block the way to make counterfeit products by purchasing trademarks, but cannot block the way to make counterfeit products by using old containers. (2) All-round anti-counterfeiting: products are covered after loading, then use the label to seal the joint between the cover and the hearing. The label and the cover should be firmly bonded. After the bar code is printed across the longitudinal seam of the label, the all-round anti-counterfeiting packaging work of bar code printing is completed. The road where the bar code is blocked to make counterfeit trademarks is also blocked to make counterfeit using old containers. The use of bar code printing position anti-counterfeiting should meet the following two conditions:(1) to ensure that the old container bar code can not be used again (2) to ensure that the field printing equipment can not be replaced by other printing at a lower price.

Anti-counterfeiting is imperative, bar code technology will also be more widely used in the tide of commodity economy. Grasping the pulse of the development of bar code technology will undoubtedly make an objective prediction of the future of packaging anti-counterfeiting. Therefore, the development of bar code technology related to anti-counterfeiting packaging technology should arouse the attention of relevant people.