Development and application of the hottest magneti

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Talking about the development and application of magnetic ink

in the 60's of the 20th century, with the development of electronic technology, magnetic ink was first used in banking and postal services. At that time, magnetic ink was not used for anti-counterfeiting, but mainly for the automatic processing of bills by banks and the automatic sorting of letters by postal services. Therefore, magnetic ink was only used for printing letters and numbers, so as to automatically identify and process printed pieces, that is, magnetic ink character recognition (MICR). Since the 1980s, the magnetic ink has been no longer limited to black or a limited range of colors, but expanded to four-color magnetic ink

at present, the annual consumption of magnetic oil black in the world has reached as much as thousands of tons, which is mainly used for the printing of symbols and letters on cheques. The printing method is general (2) the certificate number of the evaluation institution: the national environmental assessment certificate Jia Zi No. 1801 is lithography and embossment; There is also the tape strip used to print the letter card

another kind of optical character recognition (OCR) is basically similar to the situation of MICR technology. This technology was invented in 1952. The device is called reader for short, also known as optical scanner. It is a device that uses optical principles to identify letter symbols. Its output system can generate magnetism or directly input it into the computer for data processing

the ink used in this device is OCR ink (also known as optical reading ink from Latin America to Asia Pacific). There are generally two types: non readable and readable. The latter mainly refers to black inks, while the former refers to various color inks. OCR inks can be designed according to general types of inks, such as lithography, embossing, gravure and silk screen printing. The pigment content in unreadable inks is generally between 1% and 5%, and some can be used to about 20%. At present, in the field of document classification, the MICR has been quickly replaced by OCR, because the OCR information is input into the computer faster. MICR is mainly used in printing anti-counterfeiting and information recording

substrate substrates used for magnetic printing include polymer materials and paper. Polymer materials are mainly polyester, rigid PVC and nylon, while paper is mostly selected from some top-grade paper, which is coated or coated after printing, which not only has good printing adaptability, but also improves the mechanical properties of paper, such as wear resistance

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