HP 9120 HP Officejet 9100 - User Guide - Page 49
Guidelines for storing media, environment. This can cause such things as streaks, smudging
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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. ENWW Choosing the print media 47