Lexmark C540 Service Manual - Page 30
Media guidelines, Paper characteristics, Unacceptable paper
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5025-2xx, 4xx Material Type Weight Select Envelopes (Multipurpose feeder or manual slot only) Sulfite, wood-free or 60 to 105 g/m2 to 28 lb bond)3, 4 up to 100% cotton bond 1 For 60 to 176 g/m2 paper, grain long fibers are recommended. 2 Paper less than 75 g/m2 (20 lb) must be printed with Paper Type set to Light Paper. 3 100% cotton content maximum weight is 24 lb bond. 4 28 lb bond envelopes are limited to 25% cotton content. 5 The duplex unit supports paper weights between 60-105 g/m2 (16-28 pound) grain long bond. The duplex unit does not support card stock, transparencies, envelopes, or labels. 6 Lexmark transparency part numbers 12A8240 and 12A8241 are supported from the standard tray, manual slot, and the multi-purpose feeder. 7 Paper 90 to 104.9 g/m2 (23.9 to 27.8 lb) must be printed with Paper Type set to Heavy Paper. 8 Paper 105 to 176 g/m2 (27.9 to 47 lb) must be printed with Paper Type set to Cardstock. Media guidelines Paper characteristics The following paper characteristics affect print quality and reliability. Consider these characteristics when evaluating new paper stock. • Weight-The printer can automatically feed paper weights from 60 to 176 g/m2 (16 to 47 lb bond) grain long. Paper lighter than 75 g/m2 (20 lb) might not be stiff enough to feed properly, causing jams. For best performance, use 80 g/m2 (21 lb bond) grain long paper. For paper smaller than 182 x 257 mm (7.2 x 10.1 in.), we recommend 90 g/m2 or heavier paper. • Curl-Curl is the tendency for paper to curl at its edges. Excessive curl can cause paper feeding problems. Curl can occur after the paper passes through the printer, where it is exposed to high temperatures. Storing paper unwrapped in hot, humid, cold, or dry conditions, even in the trays, can contribute to paper curling prior to printing and can cause feeding problems. • Smoothness-Paper smoothness directly affects print quality. If paper is too rough, toner cannot fuse to it properly. If paper is too smooth, it can cause paper feeding or print quality issues. Always use paper between 100 and 300 Sheffield points; however, smoothness between 150 and 200 Sheffield points produces the best print quality. • Moisture content-The amount of moisture in paper affects both print quality and the ability of the printer to feed the paper correctly. Leave paper in its original wrapper until it is time to use it. This limits the exposure of paper to moisture changes that can degrade its performance. Condition paper before printing by storing it in its original wrapper in the same environment as the printer for 24 to 48 hours before printing. Extend the time several days if the storage or transportation environment is very different from the printer environment. Thick paper may also require a longer conditioning period. • Grain direction-Grain refers to the alignment of the paper fibers in a sheet of paper. Grain is either grain long, running the length of the paper, or grain short, running the width of the paper. For 60 to 176 g/m2 (16 to 47 lb bond) paper, use grain long fibers. • Fiber content-Most high-quality xerographic paper is made from 100% chemically treated pulped wood. This content provides the paper with a high degree of stability resulting in fewer paper feeding problems and better print quality. Paper containing fibers such as cotton possesses characteristics that can negatively affect paper handling. Unacceptable paper The following paper types are not recommended for use with the printer: • Preprinted papers with chemicals that may contaminate the printer • Preprinted papers that can be affected by the temperature in the printer fuser • Coated papers (erasable bond), synthetic papers, thermal papers • Rough-edged, rough or heavily textured surface papers, or curled papers 1-12 Service Manual