Paper facts3-2 Generic MICR Fundamentals Guide• Do not use cut-sheet check paper that was converted fromfanfold by the paper distributor. This conversion process canresult in dimensional inaccuracy, poorly cut edges, andunacceptable paper curl.MICR paper requirementsThe following table summarizes Xerox’s recommendations forpapers that are used for MICR printing. Papers with the followingcharacteristics perform best in Xerox MICR printers.Basis weightBasis weight is an industry term for expressing the weight perunit area of paper. Paper weight is generally expressed as gramsper square meter (gsm), a measure that makes it easy tocompare any two pieces of paper, even if the papers are ofdifferent types, such as offset and index.Table 3-1. Xerox paper recommendationsPaper characteristics Recommended for optimal printer and reader/sorter performanceBasis weight 24-pound/90 gsmSheffield smoothness 80 to 150Grain direction Parallel to the long edge of check or MICR document. Short grain directionmay be acceptable for personal, 6 inch/152 mm checks.Moisture content 3.9 to 5.e per centReflectance 60 percent minimumCurl Refer to instructions in your MICR printing system operator guidePerforations 60 to 80 ties per inchMetallic content No ferromagnetic materials can be present in the paper.Stiffness For recommendations, refer to “Paper stiffness,” later in this chapter.Cutting precision +/- 0.030 inch/0.762 mm length+/- 0.030 inch/0.762 mm widthCoating Do not use paper containing clay or resin coatings.Lamination Do not use stock that is a combination of paper and plastic.Preprinting ink Must be heat resistant to approximately 400 degrees F/204 degrees C for laserprinting. Heat resistance varies according to manufacturer.Size Refer to instructions in your MICR printing system operator guide
