Xerox 6180N Generic MICR Fundamentals Guide  - Page 35

Paper facts • If you are using micro-perforations, be sure to have more than 60 ties to the inch. • Make sure that the perforation line is rolled sufficiently to eliminate the underside bulge (debossment). Otherwise, feeding and stacking may be unreliable and print deletions may occur. • When paper is perforated, a ridge or dimple forms around the holes. Make sure that the design and placement of the perforation does not cause document edge irregularities. • Do not use puncture-type perforations that are not ironed smooth. They prevent the stack from lying flat, which can cause feeding problems and deletions. Use rolled perforations instead. • Make sure that the perforation design and placement do not cause document edge irregularities. • Make sure that die-cut perforated papers are free of paper dust and chaff. • Avoid printing any text or forms data within 1/8 inch/3.2 mm of any perforation. • For printers that use edge registration: Full-length perforation that is parallel to the registration edge should not be closer than 1.5 inches/37.5 mm to that edge. Metallic content Paper stock materials for MICR applications cannot contain ferromagnetic particles. Stiffness Stiffness refers to the rigidity or bending resistance of the paper. Thicker papers are usually stiffer. In general, 16 pound/60 gsm and lighter papers are not as stiff as heavier stocks. They may bunch up or wrinkle in the printer, causing jams and misfeeds. Heavier papers, such as cover and index stock, may jam more frequently and have more print quality defects (skips, blurs, and deletions) due to their reduced ability to bend. 24 pound/90 gsm paper usually provides stiffness levels in the range needed by the Xerox MICR laser printer and the proofing, reader sorter, and remittance-processing systems used in banking environments. Generic MICR Fundamentals Guide 3-7