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Unopened paper in sealed reams can remain stable for several months before use. Opened
packages of paper have more potential for environment damage, especially if they are not
wrapped with a moisture-proof barrier.
The paper storage environment should be properly maintained to ensure optimum
performance. The required condition is 20° C to 24° C (68° F to 75° F), with a relative
humidity of 4 percent to 55percent. The following guidelines should be considered when
evaluating the paper’s storage environment:
• Paper should be stored at or near room temperature.
• The air should not be too dry or too humid.
• 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.