Several common paper anti-counterfeiting technologies in the papermaking process

In the papermaking process, various anti-counterfeiting technologies are used to produce various anti-counterfeiting papers for printing packaging labels or packaging papers to achieve anti-counterfeiting. At present, there are mainly the following paper anti-counterfeiting technologies.

First, laser holographic technology. The laser hologram technology was used to directly fabricate the laser holographic pattern on the paper to make a laser hologram security paper.

Second, the watermark technology. In the process of paper web forming, this technique uses a watermark with an engraved texture to roll the printing paper surface when the paper sheet has just interweaved with a certain amount of moisture, so that the wet tissue part is displaced to form different fiber densities. Various graphic, digital, or text watermarks with light and shade textures.

Some companies also filed their own special watermark patterns with specific management departments. At the same time, papermaking companies no longer manufacture the same special-purpose paper for other users. Although this has increased the cost of paper, it has also greatly increased the cost of the paper. Its anti-counterfeiting effect is ideal.

Third, special additives technology (1) add color fiber silk. Color fiber filaments are colored fibers that are distributed on the paper surface and have different colors from the paper. The color, length, thickness, degree of exposure and distribution of the fibers are somewhat different.

(2) Join the security line. Security lines refer to the embedding of opaque long strips of metal or plastic tape in all or part of the paper, often with transparent or holographic microtext information, magnetic information, etc. The production of security lines requires high papermaking technologies and complicated processes, especially the security of open windows (intermittently exposed). This kind of security thread is buried in the paper for a period of time, and is exposed on the surface of the paper. Forging is quite difficult. In recent years, it has also introduced a heat-sensitive security cord that is pink at room temperature and opaque. As long as it reaches 37e with a finger to warm the area, the printed text will appear locally.

(3) Add fluorescent fibers. In the papermaking process, colorless fluorescent fiber strips are added to the pulp in proportions. The paper can display fluorescent fiber strips under ultraviolet excitation, which can serve as a public identification function.

(4) Add trace amounts of additives. Using the principle that organisms have an anti-body-specific response, a very small amount of anti-elements is added to a certain part of pulp or paper. When detecting, it is combined with the corresponding specific antibody, and the presence or absence of the reaction of the marker, fluorescence, etc. is used to distinguish the authenticity from the others.

Fourth, chemical technology. Chemically-encrypted paper is made by adding special compounds to the pulp when it is added to the surface of the paper or when sizing on the surface of the paper. The paper is colored or exhibits fluorescence when coated with specific chemical reagents.

Fifth, special equipment technology. Papermaking uses special equipment, such as special anti-counterfeit paper for ion media, relying on the state-controlled large-scale heavy ion accelerators to integrate the ion micropore technology and papermaking technology into a special anti-counterfeit paper for super ion media.

Also for example, the use of laser anti-counterfeiting technology and special equipment combined with paper can be made of laser anti-counterfeiting paper.