Basic principle of the most popular magnetic ink p

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Basic principle of magnetic ink printing technology

magnetic LNK printing, abbreviated as magnetic printing, as an anti-counterfeiting printing technology of special ink, is a way to add magnetic substances to the ink for printing. Magnetic printing belongs to the field of magnetic recording technology. The production of magnetic recording body is completed by magnetic printing to make it have the required special properties

1. Basic technology of magnetic printing

magnetic printing is formed by applying a magnetic layer on the paper or plastic design sheet base, printing words or patterns on other parts, and displaying the visual information corresponding to the use conditions. The film base of magnetic printing requires moderate toughness, uniform thickness, smooth surface, not easy to stretch or curl when temperature and humidity change, good water resistance and corrosion resistance, good printing and processing adaptability and low price. Commonly used materials include offset paper, coating paper, resin impregnated paper, PVC, pet and other plastic sheet substrates and their composites, with a thickness of 150 ~ 800 microns

2. Basic principle of magnetic printing

the magnetic recording principle used for anti-counterfeiting magnetic printing is basically the same as that of recording tape, except that the requirements for anti-counterfeiting magnetic printing magnetic recording are relatively low, and the requirements for magnetic quality of magnetic materials after magnetic induction are also low

3. Development of magnetic ink

at present, MICR (also referred to as MCR) has been quickly replaced by OCR in document classification, because OCR inputs information into the computer quickly. MICR is mainly used in printing anti-counterfeiting and information recording, such as polyurethane adhesive, organic silicone adhesive, urea formaldehyde adhesive with low formaldehyde emission, epoxy adhesive, etc

4 changing universal machine uses the spring changing force to measure the torque that the workpiece can bear, and the application of magnetic printing

at present, magnetic printing is applied in many fields, such as train tickets, monthly tickets, printing, bank passbooks, ID cards, etc; A magnetic film is used on the price indication card; Magnetic ink can also be used to print gold on the data registration form and check, which makes the experimental machine unable to carry out the amount and other items. Magnetic printing is used more and more widely. The fourth set of RMB certificate numbers are printed with magnetic ink

Japan uses magnetic ink to print yen, but where and how much this ink is used is absolutely confidential. According to relevant experts, the magnetic ink of the Japanese yen banknote with a face value of 10000 yuan is in the upper right corner. There are as many as 14 elements that can be detected in the ink, among which the magnetic metals are iron, cobalt and nickel. The content of iron is the highest, cobalt and nickel are extremely trace. Tests show that the main component of magnetic ink is iron oxide, which is mixed with cobalt. The paper magnetic field intensity is 12 Gauss, which is one number pole higher than the geomagnetic field

due to the easy availability of magnetic materials and the fact that the magnetic ink printed on the product is subject to external friction, the magnetism is reduced or even disappeared, affecting its anti-counterfeiting effect. It is reported that the anti-counterfeiting ink which shows its characteristics after being excited by electromagnetic wave has been successfully developed in China

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