Xerox 6180N Generic MICR Fundamentals Guide - Page 41
Preprinted forms considerations
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Paper facts Preprinted forms considerations The combination of consistent data format and element location makes preprinted forms useful in MICR applications. Additional requirements for security features, either in the base paper stock or in the preprinted form, come from the need to protect a financially negotiable document. You need to consider several factors related to ink and paper when selecting a preprinted form for any type of laser printer. Preprinted check stock must not offset (transfer from a printed sheet onto other surfaces). Work closely with the forms vendor to ensure that requirements are understood and met. Always test the application on the appropriate printer before production printing. Inks Choosing the correct ink is the first step in designing forms that function well in Xerox printers. Inks for these forms must cure well, must not be tacky, and must not offset. In choosing an ink, you must consider the amount of heat and pressure to which the forms will be exposed while passing through the printer. You must also consider the dwell time-the amount of time that the preprinted paper is subjected to those conditions. Good performance has been reported with the following ink types: • Oxidative inks: The following qualities are desirable in oxidative inks: - Non-volatile, cross-linkable vehicles - Internal and surface-curing driers - Minimal use of antioxidants - No slip agents - pH in the press fountain high enough to permit curing NOTE: Oxidative inks can require several days to harden satisfactorily. • UV cured inks: Inks that are cured using UV (ultraviolet) light change immediately from liquid to solid upon exposure to an intense UV light source. Generic MICR Fundamentals Guide 3-13