8-1
8 Paper Specification
8.1
Basic Theory of Operation
Laser printers use the electrophotograhic technology. The laser beam writes an
electrostatic image onto a rotating photosensitive drum (Photoconductor). As
this image passes the developer station, a dry, powdery toner is attracted to the
image areas. The developed image then advances to the transfer station where
the drum contacts the fanfold paper and the toner image is electrostatically
transferred onto the paper. After transfer, the paper passes through the fuser
where heat and pressure are applied and the toner fuses (melts) onto the
paper. The fanfold paper is then deposited to the paper exit.
To create the printed image, all print media must be transported through the
printer, charged electrostatically, and heated. This is why paper properties such
as electrical resistivity, caliper, finish, and stiffness can affect the print quality
and paper handling perfomance of the laser printer.
8.2
Storing Media
Follow these guidelines when stacking and storing fanfold paper:
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Do not store cartons with fanfold paper directly on the floor. Place
cartons on a pallet or on shelves.
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The carton itself must have a relative humidity of 33 up to 47 % at a
temperature of 19° to 23° C (68° to 73° F). Otherwise the humidity
penetrates from the carton into the fanfold paper.
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Do not store the fanfold paper near heating elements, water pipes, open
windows, clammy walls, or in direct sunlight.
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The fanfold paper in the carton and plastic wrap should be stored at a
room temperature of 18° to 24° C (65° to 75° F) and of a relative
humidity of 40 to 60 %.