Packing security discussion (2)

Anti-counterfeiting technology

2.1 Engraving and gravure printing Engraving and gravure printing is not only complicated in process, but also involves a large investment in equipment, and the design and plate making are different from general printing. The printing artwork has a prominent sense of bulge. The engraving and intaglio printing with latent image has a simple identification method and is not easy to imitate. The advantages. To date, the printing of many security documents and large denomination banknotes still uses the intaglio engraving process.

2.2 Laser Holography

Holography refers to all information. Holography is the use of light interference principle, the specific light waves emitted by the object in the form of interference fringe recorded into an image; this image records all the information of the object, so called hologram. When light shines on the hologram, the reproduced object image is observed due to the diffraction of light. Since the laser is a good coherent light source, it can be recorded by laser light and reproduced by laser light, so it is called a laser hologram. What is used at home and abroad is the white light reproduction holography technology, which mainly utilizes the characteristics that they can be reproduced under sunlight or ordinary incandescent light. It is divided into two categories: embossed hologram and reflection holography.

2.3 Offset + Gravure Printing Technology

The advantage of gravure printing is that there are more inks or polishes transferred to the substrate. The transfer amount is 3 to 4 times more than other printing methods. When using gold ink, silver ink, or pearl powder, it is necessary to obtain the desired gloss. Use large particles of pigment. For offset printing, when the number of printing lines is 60 lines?cm, the allowable pigment particles are 5?25L; for gravure, when the same number of lines, the allowable pigment particles are 10?60L. In addition, due to the wide selection of binders and solvents, gravure printing can be used to obtain the desired coating or glazing effect; however, the typical web gravure printing is only suitable for long-lived applications, thus limiting its scope of application. . The combination of offset printing and gravure printing is a kind of "strengthening weaknesses" solution.

2.4 Strong ultraviolet laser anti-counterfeiting technology

Strong UV laser anti-counterfeiting technology uses a high-power density UV laser to act on the target (this target can be copperplate paper, tipping paper, or other treated paper, or it can be specially treated other materials such as glass, ceramics, etc.) A specific photochemical reaction or physical change occurs, creating a new colored substance in a very short period of time, resulting in discoloration and printing visible marks on the target.

2.5 Laser Gold Iris Technology

Laser holographic iris technology uses laser holography to make stencils in a shockproof chamber, and then transfers the pattern to some kind of carrier through a certain pressure. Its products are illuminated by a 45-degree point light source, which can produce a unique rainbow-like effect, and the three-dimensional image of the product is extremely strong, and it is highly favored by consumers. It is known by some people of insight as 21st century ink-free color printing. Surgery. At present, cold press coating and hot stamping are two more processes that are used for direct hot stamping. Due to the complexity of the plate making process of this technology and its difficulty, only a few domestic manufacturers can produce it, so the anti-counterfeiting effect is excellent. It should be particularly pointed out that holography is the use of a laser light source in a shockproof room to simultaneously take in the amplitude information and phase information of the light wave of the scene in a very short time, using the principle of interference of light to form each mass point of the scene, forming all information. . In the plate making process, the fine air movement in the room can cause the color change of the holographic image. Therefore, it is impossible to make two identical hologram plates anyway.

2.6 Bar Code Anti-counterfeiting Technology

Product bar code is a kind of code for a product. It is designed by humans for the effective management of goods by computer. If we can reasonably use commodity technology, including the rational selection of the carrier of the barcode, a reasonable choice of printing methods and printing machines, and a reasonable choice of the location of the printing, etc.; then it is possible to make the commodity barcode technology have a security effect. Currently, there are only two types of bar codes with anti-counterfeiting functions. One is the hidden bar code covered implicit bar code, the photochemically processed invisible bar code, and the hidden bar code printed by the invisible ink; the other is the metal bar code.

2.7 security code identification and telephone identification system

The code anti-counterfeit identification and telephone identification system is to set a random password on each product to archive all the network access product records in the anti-counterfeit data center library, allowing consumers to verify the correctness of the password by using tools such as telephones and computers. The authenticity of the product. This anti-counterfeiting technology is implemented on the same physical object to achieve a high degree of anti-counterfeiting.