Kyocera FS-6020 Operation Manual page 70

Paper Weight Equivalence Table
The paper weight is listed with expression in U.S. bond weight
(lb) and European metric (g/m²). The shaded point indicates the
standard weight.
U. S. Bond Weight (lb)
16
17
20
21
22
24
27
28
32
34
36
39
42
43
47
53
Thickness (Caliper)
Thick paper is referred to as high-caliper paper and thin
paper as low-caliper paper. The paper used with the printer
should be neither extremely thick nor extremely thin. If you
are having problems with paper jams, multiple feeds, and
faint printing, the paper you are using may be too thin. If you
are having problems with paper jams and blurred printing,
the paper may be too thick. The proper thickness is 0.086 to
0.110 mm (3.4 to 4.3 mils).
Moisture Content
Moisture content is defined as the percent ratio of moisture to
the dry mass of the paper. Moisture can affect the paper's
appearance, feedability, curl, electrostatic properties, and
toner fusing characteristics.
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 misfeeding and alignment
anomalies. The moisture content of the paper should be 4 to
6%. To ensure the proper moisture content, it is important to
store the paper in a controlled environment. Some tips on
moisture control are:
Europe Metric Weight (g/m²)
60
64
75
80
81
90
100
105
120
128
135
148
157
163
176
199
•Store paper in a cool, dry location.
•Keep the paper in its wrapping as long as possible. Rewrap
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 printer for 48 hours before use.
•Avoid leaving paper where it is exposed to heat, sunlight, or
damp.
Paper Grain
When paper is manufactured, it is cut into sheets with the
grain running parallel to the length (long grain) or parallel to
the width (short grain). Short grain paper can cause feeding
problems in the printer. All paper used in the printer should
be long grain.
Other Paper Properties
Porosity: Refers to the density of the paper structure; that is,
how openly or compactly the fibers are bonded.
Stiffness: Limp paper can buckle inside the printer, while
paper that is too stiff may bind. Either way the result is a
paper jam.
Curl: Most paper has a natural tendency to curl in one
direction. The paper should be loaded so that the natural curl
is downward, to counteract the upward curl imparted by the
printer. Printed sheets will then come out flat. Most paper
also has a top and bottom surface. Loading instructions are
usually given on the paper package.
NOTE
If the paper is considerably curled in one direction, e.g. when the
paper was used to print on one side, try to roll the paper in the
opposite direction to counteract the curl. Printed sheets will then
come out flat.
Electrostatic properties: 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 printer 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 properly
packaged.
Chapter 2 Paper Selection
2-3