Discussion on anti-counterfeiting technology of th

Discussion on the anti-counterfeiting technology of packaging materials

in the anti-counterfeiting technology of products, packaging anti-counterfeiting is a major means of anti-counterfeiting, and packaging material anti-counterfeiting is an important way of packaging anti-counterfeiting. This paper discusses the anti-counterfeiting technology of packaging materials including packaging materials, labels and trademark materials. It is emphasized that attention should be paid to whether the joint gasket completely has the anti-counterfeiting characteristics of anti-counterfeiting bronzing materials, trace additives and chemical encryption paper, watermark paper, fiber filament, safety wire, anti copy paper, layered dyed white board, thermal paper, photochromic paper and anti-counterfeiting sealing strip

[Key words] anti counterfeit packaging technical materials

at present, there are basically two ways to manufacture and sell fake famous and high-quality products in society: one is to use real packaging and fake products; The other is fake packaging, fake products, that is, fake packaging of famous and high-quality products, and then loaded with fake products for sale. No matter which way of forgery is adopted, it is closely related to packaging. Packaging anti-counterfeiting is to use various technical means to make the packaging of products have some special performance characteristics, so that the general processing and manufacturing methods are difficult to imitate, so as to achieve the purpose of effective anti-counterfeiting

packaging and printing is a main means of anti-counterfeiting technology [1]. Packaging material anti-counterfeiting technology is an important way of packaging and printing anti-counterfeiting. The packaging materials used for packaging anti-counterfeiting generally should have:

a. the composition, proportion and manufacturing technology of the materials are exclusive within a certain period of time

b. the characteristics of a destruction that should leave recognizable traces after the package is used (such as tearing)

c. operators should not be afraid when encountering problems. They have easy recognition characteristics that do not need complex equipment inspection, and can be identified only by using human senses or simple instruments

the packaging materials discussed in this paper include traditional packaging materials, label printing materials and trademark printing materials

types and anti-counterfeiting characteristics of anti-counterfeiting printing materials

1 anti counterfeiting hot stamping materials

hot stamping foils include gold foil, magnetic foil and holographic magnetic composite foil. Using the characteristics of reflective and embossing effect of hot stamping foil, we can emboss and Emboss special embossed patterns and words on hot stamping foil through the design of graphics, images and words in the process of packaging production, which is an anti-counterfeiting packaging product that is easy to identify and not easy to copy. For example, blockfoil company has introduced bronzing embossing materials with high resolution. Due to the use of pearl pigment in transparent foil materials, the embossed images will show a variety of different colors when viewed from different angles. Thus, the inner label has the function of preventing counterfeiting with copiers and scanners

the magnetic foil (such as the magnetic foil produced by TSSI company) stores the data on the magnetic foil by using magnetic watermark and encryption technology, which plays an anti-counterfeiting role

holographic magnetic composite foil (such as holomagne ICs foil developed by abnh) not only has the advantages of visual discrimination of holographic images, but also has the machine-readable characteristics of magnetic strips. Users can use this kind of foil to reduce the cost of raw materials and bronzing, and enhance the anti-counterfeiting effect

1.2 trace additives and chemical encryption paper

using the principle that biology has anti elements and antibodies have specific reactions, a trace of anti elements are added to a local position of pulp or paper. During the test, the corresponding specific antibody is combined with it, and the true and false can be distinguished by observing the reaction of chromogenic, fluorescent and other markers. Trace chemical elements can also be added to the paper to distinguish the true from the false

chemical encryption paper is a special compound added to pulp or when sizing on the paper surface. When the chemical encryption paper is coated with a specific chemical reagent, it can develop color or fluorescence. This kind of paper can be used as anti-counterfeiting printing materials such as packaging, internal labels and trademarks

1.3 watermark paper

watermark paper (watermark paper) is an ancient and effective anti-counterfeiting paper [2]. Watermark is the most easily recognized method with the naked eye. It has been used since its inception, and has developed with the continuous development of related technologies. Watermark paper is in the forming process of the paper web, using the upper forming technology, when the paper is just intertwined and has a certain amount of moisture, the watermark with carved lines is used to roll and imprint the paper surface, so that part of the tissue of the wet paper is displaced to form various marks or patterns. Due to the different thickness between the watermark image and the blank, the density and light transmittance of the paper are different, so that the watermark image and text can be displayed clearly and transparently under the irradiation of ordinary back light. After the paper watermark is formed, it will not be strongly deformed due to the changes of color, light and temperature. The watermark pattern is concise and the watermark pattern can be customized into a special watermark according to the requirements. The contour is soft, the process is complex, and it is difficult to accurately imitate, so it is very difficult to copy. In addition, in order to protect its specific users, the paper factory does not use the specific watermark as paper for manufacturing other specific objects, which has strong anti-counterfeiting characteristics. Watermark paper is easy to be produced on a large scale, and can maintain the relative consistency of the products before and after under the same production process and equipment conditions

there are many varieties and specifications of paper watermarks used as anti-counterfeiting according to different classification methods. From the watermark production itself, according to different processes or products, the watermark can be divided into full version watermark, continuous watermark, fixed watermark, full version fixed hybrid watermark. The fixed watermark is usually fixed on a certain position of the layout according to the design, and it usually needs to be accurately matched with the printed text or other anti-counterfeiting measures visible to the naked eye. Semi fixed watermark the distance and position between each group of watermarks are fixed by design, and each group is continuously arranged on the paper, so it is also called continuous watermark, which is mostly used for special paper. The watermark in an unfixed position is distributed on the whole outer surface of the paper, so it is also called full page watermark. Fixed and semi fixed watermarks have good anti-counterfeiting performance because of the difficulty of encrypting design information, printing process and technology. At present, foreign countries have developed a new type of transparent watermark, which can only be displayed and recognized when viewed from a certain angle. After all, the overheated market sentiment is gradually calmed down by scanning, and the scanner cannot copy it

1.4 fiber silk, color dot encryption paper

1.4.1 fiber silk ground and fiber spot color anti-counterfeiting technology

when making paper, I add fiber filaments [3] or color dots into the pulp. It can be divided into three types: fiber silk ground, fiber spot color and fiber code anti-counterfeiting

among the fiber spot color anti-counterfeiting materials, the fibers mixed into the pulp include color fibers and colorless fluorescent fibers. The former can be seen on paper with the naked eye; The latter and color dots must be visible under ultraviolet radiation. Their colors include red, blue, orange, etc. their shapes can be coarse or fine, long or short. Depending on the design, the anti-counterfeiting function of the latter is higher than that of the former

in the anti-counterfeiting technology of fiber texture, metal foil, flat polyester silk with words, plastic chips, discs and fibers with special spectral characteristics are also mixed into pulp as anti-counterfeiting fibers to produce anti-counterfeiting encrypted paper. Among them, the words on the flat polyester yarn can only be seen when observing the light in a certain direction. It can't be copied with the copier, and the anti-counterfeiting performance is good

the positions of fibers and color dots in the paper are generally randomly distributed, so their density and embedding are different. It can also be fixed at a certain position by coding

(to be continued)