Olivetti d-Color MF920, Service Manual

Page: 35 / 332

General information
1-13
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/m
2
(16 to 47 lb bond) grain
long. Paper lighter than 75 g/m
2
(20 lb) might not be stiff enough to feed properly, causing jams. For best
performance, use 80 g/m
2
(21 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
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 to48 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/m
2
(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
•
Recycled papers containing more than 25% post-consumer waste that do not meet DIN 19 309, and
weighing more than 80 g/m
2
•
Paper weighing less than 80 g/m
2
(21 lb)
•
Multiple-part forms or documents
Y112730-2