Media Guidelines; Paper Guidelines - Konica Minolta bizhub 4020 Service Manual

bizhub 4020/3320 Service Manual

3.4 Media guidelines

3.4.1

Paper guidelines

Selecting the correct paper or specialty media reduces printing problems. For the best print quality, try a
sample of the paper or specialty media before buying large quantities.
Paper characteristics
The following paper characteristics affect print quality and reliability. Consider these characteristics
when evaluating new paper stock.
Weight
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The printer trays can automatically feed paper weights up to 120-g/m (32-lb) bond grain long paper.
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The multipurpose feeder can automatically feed paper weights up to 163-g/m (43-lb) bond grain long
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paper. Paper lighter than 60 g/m (16 lb) might not be stiff enough to feed properly, causing jams. For
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best performance, use 75-g/m (20-lb) bond grain long paper. For paper smaller than 182 x 257 mm
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(7.2 x 10.1 inches), we recommended to use 90 g/m (24 lb) or heavier paper.
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Note: Two-sided printing is supported only for 60–90-g/m (16–24-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, then toner cannot fuse to it
properly. If paper is too smooth, then it can cause paper feeding or print quality issues. Always use
paper between 100 and 300 Sheffield points; however, smoothness between 150 and 250 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.
Store paper in its original wrapper in the same environment as the printer for 24 to 48 hours before
printing. Extend the time to 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.
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For 60–90-g/m (16–24-lb) bond paper, grain long paper is recommended.
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