HP 2700 - Manual (Page 23)

Printing and storage environment
Ideally, the printing and media-storage environment should be at or near room temperature, and not too
dry or too humid. Remember that paper is hygroscopic; it absorbs and loses moisture rapidly.
Heat causes the moisture in paper to evaporate, while cold causes it to condense on the sheets. Heating
systems and air conditioners remove most of the humidity from a room. As paper is opened and used,
it loses moisture, causing streaks and smudging. Humid weather or water coolers can cause the humidity
to increase in a room. As paper is opened and used it absorbs any excess moisture, causing light print
and dropouts. Also, as paper loses and gains moisture it can distort. This issue can cause jams.
As a result, paper storage and handling are as important as the paper-making process itself. Paper
storage environmental conditions directly affect the feed operation and print quality.
Evaluate purchasing more paper than can be easily used in a short time, about three months. Paper
stored for long periods can experience heat and moisture extremes, which can cause damage. Planning
is important to prevent damage to a large supply of paper.
Unopened paper in sealed reams can remain stable for several months before use. Opened packages
of paper have more potential for environmental damage, especially if they are not wrapped with a
moisture-proof barrier.
The media-storage environment should be properly maintained to ensure optimum printer performance.
The recommended condition is 20° to 24°C (68° to 75°F), with a relative humidity of 45% to 55%. The
following guidelines should be helpful when evaluating the paper storage environment:
● Print media should be stored at or near room temperature.
● The air should not be too dry or too humid to moderate the hygroscopic properties of paper.
● The best way to store an opened ream of paper is to rewrap it tightly in its moisture-proof wrapping.
If the printer environment is subject to extremes, unwrap only the amount of paper to be used during
the day's operation to prevent unwanted moisture changes.
● Avoid storing paper and print media near heating and air conditioning vents or near windows and
doors that are frequently open.
ENWW Printing and storage environment 13