Magnetic printing is a method of printing using magnetic ink mixed with iron oxide powder. Magnetic printing 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 words, patterns, and photos can be seen visually.
Magnetic printing is a paper or plastic base coated with a magnetic layer, and other parts are printed with words or patterns, and a printing layer is used to display visual information corresponding to the use status, and processed by molding.
The base of magnetic prints requires moderate toughness, uniform thickness, smooth surface, not easy to stretch or curl when temperature and humidity changes, good water resistance and corrosion resistance, good printing, and processing suitability, and low price. Commonly used materials are offset paper, coated paper, resin-impregnated paper, polyvinyl chloride (PVC), polyethylene terephthalate (PET), and other plastic substrates and their composite materials, with a thickness between 150 and 800 microns.
The requirements for magnetic powder are high magnetic saturation, uniform particle size, good dispersion, stability, and long aging. Commonly used are maghemite, and 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 black ink and other color pigments to color ink make the color.
Magnetic printing uses screen printing or offsets printing to obtain tape or graphic magnetic layers, which can form magnetic tapes necessary on the card, thereby reducing costs, while the content of magnetic pigments in magnetic inks, the magnetic properties of colors, and the thickness of the ink film layer after printing, etc. affect the magnetism.
After the magnetic print is printed, a transparent PVC sheet is laminated on both sides, pressed with a hot press, and die-cut according to the specified size.
In order to prevent counterfeiting and tampering, magnetic printing has higher and higher security and confidentiality, so unique materials or technologies are used in magnetic materials, printing, and processing methods. For example, special plate-making techniques and inks are used in printing, including printing with fluorescent inks, heat-sensitive color-changing inks, and infrared-absorbing inks, and measures such as ground pattern printing, micro printing, and rainbow holography are used to prevent counterfeiting.
Magnetic printing is widely used in finance, credit, communication, office, production management, and so on.
