What is magnetic printing?

Magnetic printing (magnetic ink printing) is a method of printing using magnetic ink doped with iron oxide powder. Magnetic printed matter is a unique recording medium produced by the combination of recording technology and printing technology. Its characteristic is that data can be written and read on the magnetic card, and the words, patterns and photos can be seen visually.
Magnetic prints are made by applying a magnetic layer on the base of paper or plastic, printing characters or patterns on other parts, and a printing layer to display visual information corresponding to the use status, which is processed by molding.

The base of the magnetic printed matter requires moderate toughness, uniform thickness, smooth surface, no expansion or curling 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, coated paper, resin-impregnated paper, and plastic bases and composite materials such as polyvinyl chloride (PVC) and polyterephthalate (PET), with a thickness between 150 and 800 microns.

The requirements for magnetic powder are large magnetic saturation, uniform particle size, good dispersion, stability, and long aging. Commonly used are maghemite, iron monoxide attached to drill iron. Magnetic ink is composed of magnetic powder pigment, binder, desiccant, antioxidant, wetting agent, and other additives. Adding carbon black to the black ink and adding other color pigments to the color ink make the color.

Magnetic printing adopts silk screen or offset printing method to obtain ribbon or graphic magnetic layer, which can form magnetic tape in the necessary places of the card, thereby reducing the cost, and the content of magnetic pigment in magnetic ink, the magnetic color and the thickness of the ink film layer after printing Etc. affect the magnetism.

After printing, the magnetic printed products are laminated on both sides of the transparent PVC sheet, pressed with a hot press, and die-cut according to the specified size.

In order to prevent forgery and tampering, magnetic printing is becoming more and more secure, so special materials or technologies are used in magnetic materials, printing, and processing methods. Such as the use of special plate-making techniques and inks in printing, including fluorescent inks, thermochromic inks, infrared-absorbing inks for printing, as well as land prints, miniature printing, rainbow holography and other measures to prevent forgery.

Magnetic printed materials are widely used in finance, credit, communications, office, production management and other aspects.

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