The complexity of anti-counterfeiting technology
Anti-counterfeiting signs must be constantly combined with new content so as to always outperform counterfeiters. But this means not only developing anti-counterfeiting technology, but also increasing the difficulty of decoding. For this reason, very special instruments are often needed to decipher anti-counterfeiting marks: for example, magnifying glasses or laser pointers with precisely defined wavelengths. People continue to increase the technical complexity of this combination of anti-counterfeiting signs, but also must make detectors everywhere can be used in the field. However, for customs officers who only have a short time and limited means to inspect the goods, how to conduct the inspection? Many anti-counterfeiting signs are visually attractive; but they must also be easy to sell and apply.
Cost problem
The second problem faced by many folding carton printers is high cost pressure: some anti-counterfeiting measures for high-end products are gradually replaced by other measures due to the use of expensive special inks or costly surface finishes. Of course, this not only takes into account the cost of special materials, but also the costs associated with this process: additional printing units, the purchase of detectors, the cost of verification and contact for counterfeit signs, and more. However, more and more low-value items are counterfeited, causing huge losses. For example, a forged small bearing has much worse machining accuracy than a genuine one, and will make a large production machine useless.
Protect by design
The directional design of anti-counterfeiting signs is becoming more and more important. The anti-counterfeiting signs are integrated into the printing data before printing, and then printed together with the color printing. For this reason, Manroland Printing Machine Manufacturing Company has planned to cooperate with different companies, and will introduce exemplary solutions in practical applications. The advantage of the directional design method is that no additional process costs are incurred once the encoded data is produced.
In addition to the verification method, it is often necessary to track the product on its way to the customer. For example, tracking through corresponding identification marks or continuous codes, while folding cartons made for brand-name products need to be coded individually. However, this identification mark cannot achieve acceptable print quality during high-speed printing. Coding and other identification signs also have shortcomings and cost issues. So, how to ensure tracking and re-tracking in order to counterfeit and gray market purchases?
At present, a new anti-counterfeiting vigorous promotion is to use the random logo of the substrate to identify the printed product according to the paper fingerprint. In papermaking, the individual paper fibers are randomly distributed from each other, so the overlapping fibers constitute a profile. This profile is absolutely different at a certain location due to the large number of fibers and the messy generation process on the microscopic plane, and has a very high probability. As long as each printed sheet has a separate fine structure, it can be optically detected, coded and stored. Therefore, the paper structure is used as a mark to identify the printed matter, which can effectively prevent counterfeiting.
Paper fingerprint
This method of identifying printed products is not new. In the 1980s and 1990s, it was patented. But this technology has not been widely used correctly. Because the paper structure is susceptible to dirt and abrasion, the paper fingerprint method is often discriminated compared with other methods in practice; also there is almost no corresponding cheap reader available for this, which is its defect in reliability identification . As for how the scanner or scanning laser can reliably identify whether the paper structure is damaged? The inventor is still researching this problem and the solution.
s2i technology
At the Hannover Fair in 2004, the research team at the University of Mannheim, with its s2i (security2image) demonstration structure, acted as a pioneer in the continued development of paper fingerprint methods. The basic innovation of s2i technology is to strengthen the paper fingerprint by means of the printing process: the unique change of the printing ink on the paper structure can serve as a symbol. Because ink acts as a catalyst for paper fingerprints, it establishes a foundation for inexpensive methods for indirect detection of paper fingerprints. At present, s2i technology is undergoing different field trials and trial applications, which can be identified using the platform scanners available in each office.
Cheap and safe
It is very cheap to make s2i identification marks-small codes can be printed together on the printing press, and can be decoded using scanners that are common in the market. In addition, this method provides a high degree of security against falsification, because s2i data is stored in the identification mark in digital form, so digital passwords can be used in accordance with the public key system (pks). Compared with the simulation method, pks is considered to be more safe and reliable.
pks (public key system) stipulates the use of a pair of passwords, using one of the two passwords to compile the password data, only another password can be used for decoding. Although it is possible in principle to decipher this password, it is practically impossible for counterfeiters to know not only the password but also the secret location of the measurement paper structure, because it is not worth the effort Go for fraud.
s2i-fingerprint printing
In addition, the s2i method has a strong ability to prevent fingerprint wear and paper dust. The code based on printing has a high data density, and the data can be stored repeatedly. It can safely identify defects during decoding and eliminate areas involved in analyzing paper and printing structures. This high reliability is the main advantage compared to the method based on pure analysis of the paper. As we all know, the folding carton will be subjected to a variety of loads during loading, transportation and storage. The s2i method is used to ensure that such damage can be identified. For this reason, the expert committee of the German Ministry of Education and Research (bmbf) gave a high evaluation of the new generation of s2i technology for paper fingerprints, and accepted the submitted draft project under a large number of innovative suggestions. In 2008, it is planned to start a project with the name o-pur. The o-pur project studies new detection instruments and existing possibilities to identify products using new technologies and software. It will continue to be the content of the German Ministry of Education and Research. Currently, it has begun to check the use of mobile phones in digital cameras. In the case of 100% market coverage in Germany and the number of mobile phones with camera function still growing, people can easily use mobile phones as identification media.
Manroland is also a temporary organization member of the German Ministry of Education and Research (bmbf) planning project. In order to quickly detect images and encode them on production machines, in printing and post-press processing, they are currently working on another project for this project. They tested the paper fingerprint detection and coding on their own printing presses. First, offset printing, but also all other printing methods were tested. Facing high-speed production, this is undoubtedly a challenge for image analysis. However, the theoretical model of the engineering project already exists, and it should be implemented and tested within the scope of the project of the Ministry of Education and Research. In addition, s2i coding should also be tested on other materials. In this regard, the personality of the ink and the substrate cooperate with each other to provide a personalized graphic that can be recognized.
Nowadays, the cost of a high-efficiency anti-counterfeiting unit is less than 1 Euro cent, and it can be applied to the bulk market. The goal of this plan is to apply it in as many ways as possible. Although s2i technology has not been integrated into high-speed production machines, it is already available to interested parties. For example, document security and anti-counterfeiting use in digital printing.
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