Xerox 6180N Generic MICR Fundamentals Guide  - Page 42

Paper facts • Laser inks: Inks that are formulated specifically for use on forms that will pass through laser printers are a recent development that holds considerable promise. These inks cure promptly (usually within 24 hours) and are formulated with laser printer conditions as a design criterion. They can be expected to reduce offsetting and other problems encountered with other types of inks. Laser inks may be oxidative, UV, or heat set types. Another option is to use Xerox forms, whose performance is guaranteed. The same guarantee should be expected of the forms vendor chosen by the customer. Security features Checks and other negotiable require protection against fraudulent use. Security features can be incorporated into the base stock when the paper is made, or they can be part of the preprinted form. These features should be chosen to achieve sufficient document security without negative effects on printer operation. A secure document is protected against both duplication and alteration. Security features should be selected to address each of these aspects effectively when they are used in a MICR laser printing system. A detailed discussion of check security is contained in chapter 8, "Security." Duplication detection The most common security features for detecting duplication of forms include: • Microprint: Extremely small type used to print a message or phrase that is readable under magnification • VOID pantograph: A pattern of varying halftone screen frequencies in the check background that causes the word VOID to appear in the background of a copied check • Split fountain backgrounds: Continuous fade from one color to another across the document • Microfibers: Tiny colored or UV treated fibers that are incorporated into the base paper stock and are easily visible under normal or UV illumination. 3-14 Generic MICR Fundamentals Guide