Features and application advantages of laser marking anti-counterfeiting
The basic principle of laser marking is to use a high-energy-density laser beam to act on the surface of the material. By focusing, the surface material is instantly vaporized or the color changes. The path of the laser on the surface of the material can be controlled to form the required permanent map Text mark. Because laser marking can produce a variety of characters, symbols and patterns, the character size can be on the order of millimeters to micrometers, which has special significance for product anti-counterfeiting, so it is widely used in the anti-counterfeiting market.
Prior to large-scale laser marking applications, the markings on packages were usually printed with ink. The mark printed by this traditional method is easy to fall off and blur with time, easy to be tampered with, and unable to perform high-precision operations. Although it has advantages in terms of equipment cost, the continual cost of consumables (ink) is relatively high, and it will cause some pollution to the environment.
Taking the most common food packaging as an example, because the marks printed by traditional methods are easy to erase and fall off, some criminals will print some brand names of expired or even fake products, or modify the production date to make these substandard products. Circulated in the city. Such phenomena are common in the fields of grains and oils, beverages, snacks, sauces and so on. In addition, for some paper-based food packaging, the harmful substances of ink may penetrate the packaging to contaminate food, posing a threat to consumers' health.