Xerox 6180N Generic MICR Fundamentals Guide - Page 26
MICR printing technologies
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Environment MICR printing technologies The following basic printing techniques are capable of generating magnetic characters: • Letterpress Letterpress is based upon a raised typeface that sits above the plane of the image carrier. The typeface is inked with special magnetic ink and applied to the paper under pressure. Common forms of letterpress are: hot metal type, sequential number machines, and ribbon encoders. • Offset lithography Large offset devices are typically used to produce check stationery. The lithographic process uses magnetic ink and water to shape the image on a plate. The image is transferred to a rubber sheet called a blanket. The image is then "offset" to the paper. • Impact ribbon encoding Ribbon encoding, also called "direct printing," is a letterpress technology with a different delivery method. Instead of the ink being applied to the typeface and then to the paper, the ink is suspended on a thin sheet of backing (usually a polymer base) called a ribbon. The ribbon is held between the typeface medium (drum, daisy wheel, or hammer) and the paper, so that when the typeface is struck against the paper, the components on the ribbon are trapped and pressed onto the document to be printed. • Non-impact (xerography and ionography) Non-impact printing technologies have been growing in market penetration. They require highly sophisticated and consistent equipment utilizing magnetic materials. • Thermal ribbon encoding A non-impact, thermal transfer version of ribbon encoding combines some of the characteristics of the conventional ribbon encoding with those of non-impact technology. 2-4 Generic MICR Fundamentals Guide