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Preparation
The moisture content of the paper varies with the relative humidity in the room. When the relative humidity is high and the
paper absorbs moisture, the paper edges expand, becoming wavy in appearance. When the relative humidity is low and
the paper loses moisture, the edges shrink and tighten, and print contrast may suffer.
Wavy or tight edges can cause jams and alignment anomalies. The moisture content of the paper should be 4 to 6%.
To ensure correct moisture content, it is important to store the paper in a controlled environment. Some tips on moisture
control are:
• Store paper in a cool, dry location.
• Keep the paper in its wrapping as long as possible. Re-wrap paper that is not in use.
• Store paper in its original carton. Place a pallet etc. under the carton to separate it from the floor.
• After removing paper from storage, let it stand in the same room as the machine for 48 hours before use.
• Avoid leaving paper where it is exposed to heat, sunlight, or damp.
Other Paper Properties
Porosity: Indicates the density of paper fiber.
Stiffness: Limp paper may buckle in the machine, resulting in paper jams.
Curl: Most paper naturally tends to curl one way if left unpacked. When paper passes through the fixing unit, it curls
upward a little. To produce flat printouts, load the paper so that the upward pressure from the machine can correct their
curling.
Electrostatic discharge: During the printing process the paper is electrostatically charged to attract the toner. The paper
must be able to release this charge so that printed sheets do not cling together in the Output Tray.
Whiteness: The contrast of the printed page depends on the whiteness of the paper. Whiter paper provides a sharper,
brighter appearance.
Quality control: Uneven sheet size, corners that are not square, ragged edges, welded (uncut) sheets, and crushed
edges and corners can cause the machine to malfunction in various ways. A quality paper supplier should take
considerable care to ensure that these problems do not occur.
Packaging: Paper should be packed in a sturdy carton to protect it from damage during transport. Quality paper obtained
from a reputable supplier is usually correctly packaged.
Specially treated paper: We do not recommend printing onto the following types of paper, even if it conforms to the basic
specifications. When you use these kinds of paper, purchase a small amount first as a sample to test.
• Glossy paper
• Watermarked paper
• Paper with an uneven surface
• Perforated paper