Curl field test To check for paper curl, place a single sheet of paper onto a flat surface and measure curl at the greatest deflection, holding a ruler perpendicular to the flat surface. Figure 15. Measuring curl Cut-edge condition field test The condition of the cut edge can be easily observed with an eye loop. Under magnification, a good edge will appear even. A poorly cut edge will show fraying, jagged edges, compressed fibers, and other damage. Furnish (fiber composition) field test Use paper made from 100 percent chemical wood pulp and /or cotton fiber. Recycled paper made with no more than 5 percent groundwood is also acceptable.
Read the ream label to determine the fiber composition of the paper. Paper is usually specified as xerographic bond (suitable for copiers or laser printers) or cotton bond. Cotton bond paper of 25 percent, 50 percent, or 100 percent will be indicated on a watermark. If paper is less than 25 percent cotton bond, the watermark will not indicate a percentage. A wood-pulp test kit can also be used to test fiber composition. Fusing-compatibility field test Inspect the rollers for colored ink buildup from preprinted logos or letterhead, and for toner buildup or spots. Inspect printed output for repetitive defects and smearing.
If necessary, have users contact the forms vendor to ensure the paper’s fusing compatibility with HP LaserJet printers. 40 Chapter 2 Operating requirements C7058-90936