HP 9100 series - Manual (Page 49)

ENWW Choosing the print media 47
Guidelines for storing media
Use the following guidelines to ensure optimum all-in-one performance and to avoid problems
that are caused by improperly stored media (such as jams and poor-quality printing).
z Store media in an environment that is at or near room temperature. The air should not be
too dry or too humid.
• An improper environment can cause media to distort, resulting in jams in the all-in-one.
The required condition is 20 to 24 degrees C (68 to 75 degrees F), with a relative
humidity of 45 percent to 55 percent.
• Heat causes the moisture in media to evaporate, while cold causes moisture to
condense on the sheets. Heating systems and air conditioners remove most of the
humidity from a room. Humid weather and water coolers can cause the humidity to
increase in a room.
z Do not purchase more media than can be easily used in a short time (about three
months).
• Media stored for long periods might experience heat and moisture extremes, which can
cause damage.
z Do not open packages of media until the media is needed.
• As media is opened and used, it loses or absorbs moisture, depending on the
environment. This can cause such things as streaks, smudging, and light characters
during printing.
• Unopened media in sealed reams can remain stable for several months before use.
• The best way to store an opened package of media is to rewrap it tightly in its
moisture-proof wrapping. If the environment is subject to extremes, unwrap only the
amount of media to be used during the operation of a day to prevent unwanted
moisture changes.