Lexmark CS748de, Service Manual

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Paper 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 162l7 g/m
2
(16 to 43 lb bond) grain long.
Paper lighter than 60 g/m
2
(16 lb) might not be stiff enough to feed properly, causing jams. For best
performance, use 75 g/m
2
(20 lb bond) grain long paper. For paper smaller than 182 x 257 mm (7.2 x 10.1 in.),
we recommend 90 g/m
2
(24 lb) or heavier paper.
Note:
Duplex is supported only for 63 g/m
2
–170 g/m
2
(17 lb–45 lb bond) 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 135 g/m
2
(16 to 36 lb
bond) paper, grain long paper is recommended. For papers heavier than 135 g/m
2
, grain short is recommended.
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 can negatively affect paper handling.
Unacceptable paper
The following paper types are not recommended for use with the printer:
• Chemically treated papers used to make copies without carbon paper, also known as carbonless papers,
carbonless copy paper (CCP), or no carbon required (NCR) paper
•
Preprinted papers with chemicals that may contaminate the printer
•
Preprinted papers that can be affected by the temperature in the printer fuser
A5, JIS B5, Executive Xerographic and bond Long grain 75 g/m
2
–177 g/m
2
(20 lb to 47 lb)
Short grain 90 g/m
2
–218 g/m
2
(24 lb–58 lb)
Universal Xerographic and bond Long grain 75 g/m
2
–177 g/m
2
(20 lb–47 lb)
Short grain 90 g/m
2
–218 g/m
2
(24 lb–58 lb)
Media weight, primary tray and option tray
Size Type Weight