Laser engraving machine application in the anti forgery seal

Two aspects should be considered: a security seal is the seal of the unforgeability; two is the print identification. To solve the problem can not be forged from the seal material, production technology, production equipment and other aspects (strengthening management on the other for this project); and print identification problem from the ink, image recognition, the establishment of seal archives and other efforts to.

Laser technology and computer technology is the modern science and technology. The birth of this two technology, immediately cause the printing industry revolution. Laser Phototypesetting instead of hundreds of years of movable type printing. Typesetting is almost extinct in china. Inspired by the laser photo typesetting, these two technologies will soon introduce seal manufacturing and security fields.

Computer typesetting greatly improves seal technology level and production speed, laser engraving has successfully replaced plate die, hand tool and method of photoelectric tracking, attracted widespread attention of the relevant departments and experts.

Laser monochromaticity, high brightness, direction advantages, is widely used in materials processing, such as laser heat treatment, welding, cutting, marking etc.. On these occasions, the laser was used as an invisible “tool” role in materials, makes the material melting, vaporization, forming process. The advanced industrial countries are the advanced manufacturing technology in laser processing and vigorously promote. The principle of laser engraving is: laser beam through optical transmission mechanisms, and focusing on the surface of the material vaporized material, laser beam spot of high energy density, the formation of pits. Using computer to control the X-Y console to drive the laser head to move and in accordance with the requirements of laser switch control, the image information software treatment have been stored in the computer. In some way, when in order to read information from the computer, the laser head along the scanning path from left to right and from top to bottom line scanned back and forth. When the scan to a “1” bit, makes the laser scanning to open, a “0” bit, makes the laser off. We know, computer information is stored in binary is, this point coincides with the laser switch two states.

The stamp typesetting software popular by innovation for special laser engraving equipment consists of a laser, scanning stage, the computer to. Because of the laser in such a device generally YAG and CO2 two. YAG used for metal marking, is not easy to achieve the desired depth. This can not be used to seal carving. CO2 laser is suitable for the non metal material carving. On the seal, rubber, horn, organic glass, marble, jade, ink pad, wood can be carved, achieve the depth and better precision. CO2 laser power 1-20 watts. Carved a seal seal of 3-5 minutes, 15-30 minutes. At present, the laser spot equipment is less than 0.1mm. 0.1mm precision mechanical resolution 0.025mm repeat positioning. Engraving of the seal completely accords with the seal of the industry standard.

Laser engraving why fake? One is the process of unforgeability, manual imitation is difficult; the two is easy to be many anti-counterfeiting measures for computer typesetting by laser engraving reflected. This is the biggest advantage is different from other methods.

For example, engraving, bar code, code markings, unrepeatable dot matrix, chart, pattern; three is easy to computer archive, archive establishment seal, seals easily through computer image recognition and the archives of the sample comparison, identification.

China is a big country of seal. The security seal should be divided into two steps: at present, the management should be strengthened, as far as possible the use of some of the primary anti fake measures of actual. At the same time, we should strengthen the application of high-tech in the seal industry. Through in-depth investigation, demonstration research, science and technology, a set of feasible seal, seal technology standard, seals and seal device, a discrimination network and management system. Professional system to form a unified national.

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